The difference between Back and Rear
When used as nouns, back means the rear of the body, especially the part between the neck and the end of the spine and opposite the chest and belly. the spine and associated tissues. large and attractive buttocks. the part of a piece of clothing which covers the back. the backrest, the part of a piece of furniture which receives the human back. that part of the body that bears clothing. (now used only in the phrase .), whereas rear means the back or hindmost part.
When used as adverbs, back means to or in a previous condition or place, whereas rear means early.
When used as verbs, back means to go in the reverse direction, whereas rear means to bring up to maturity, as offspring.
When used as adjectives, back means near the rear, whereas rear means underdone.
check bellow for the other definitions of Back and Rear
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Back as an adjective (not comparable):
Near the rear.
Examples:
"Go in the back door of the house."
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Back as an adjective (not comparable):
Not current.
Examples:
"I’d like to find a back issue of that magazine."
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Back as an adjective (not comparable):
Far from the main area.
Examples:
"They took a back road."
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Back as an adjective (not comparable):
In arrear; overdue.
Examples:
"They still owe three months' back rent."
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Back as an adjective (not comparable):
Moving or operating backward.
Examples:
"back action"
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Back as an adjective (comparable, phonetics):
Pronounced with the highest part of the body of the tongue toward the back of the mouth, near the soft palate (most often describing a vowel).
Examples:
"The vowel of smallcaps lot has a back vowel in most dialects of England."
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Back as an adverb (not comparable):
To or in a previous condition or place.
Examples:
"He gave back the money. He needs his money back. He was on vacation, but now he’s back. The office fell into chaos when you left, but now order is back."
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Back as an adverb:
Away from the front or from an edge.
Examples:
"Sit all the way back in your chair."
"Step back from the curb."
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Back as an adverb:
In a manner that impedes.
Examples:
"Fear held him back."
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Back as an adverb (not comparable):
In a reciprocal manner; in return.
Examples:
"If you hurt me, I'll hurt you back."
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Back as an adverb:
Earlier, ago.
Examples:
"many years back'"
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Back as a noun (slang, uncountable):
The rear of the body, especially the part between the neck and the end of the spine and opposite the chest and belly. The spine and associated tissues. Large and attractive buttocks. The part of a piece of clothing which covers the back. The backrest, the part of a piece of furniture which receives the human back. That part of the body that bears clothing. (Now used only in the phrase .)
Examples:
"Could you please scratch my back?"
"I hurt my back lifting those crates."
"I still need to finish the back of your dress."
"Can you fix the back of this chair?"
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Back as a noun (printing):
That which is farthest away from the front. The side of any object which is opposite the front or useful side. # The edge of a book which is bound. # The inside margin of a page. #* |page=472|edition=1965 Ayer Publishing ed.|title=[http://books.google.com/books?id=sS4H3hax5hAC A Dictionary of the Art of Printing]|isbn=0833731289 |passage=Convenience and custom have familiarised us to the printed page being a little higher than the middle of the leaf, and to its having a little more margin at the fore edge than in the back.}} # The side of a blade opposite the side used for cutting. The reverse side; the side that is not normally seen. Area behind, such as the backyard of a house. The part of something that goes last. In some team sports, a position behind most players on the team.
Examples:
"He sat in the back of the room."
"Turn the book over and look at the back."
"The titles are printed on the backs of the books."
"Tap it with the back of your knife."
"I hung the clothes on the back of the door."
"We'll meet out in the back of the library."
"The car was near the back of the train."
"The backs were lined up in an I formation."
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Back as a noun (figuratively):
Upper part of a natural object which is considered to resemble an animal's back.
Examples:
"The small boat raced over the backs of the waves."
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Back as a noun:
A support or resource in reserve.
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Back as a noun (nautical):
The keel and keelson of a ship.
Examples:
"The ship's back broke in the pounding surf."
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Back as a noun (mining):
The roof of a horizontal underground passage.
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Back as a noun (slang, uncountable):
Effort, usually physical.
Examples:
"Put some back into it!"
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Back as a noun:
A non-alcoholic drink (often water or a soft drink), to go with hard liquor or a cocktail.
Examples:
"Could I get a martini with a water back?"
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Back as a noun:
Among leather dealers, one of the thickest and stoutest tanned hides.
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Back as a verb (intransitive):
To go in the reverse direction.
Examples:
"the train backed into the station;  the horse refuses to back'"
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Back as a verb (transitive):
To support.
Examples:
"I back you all the way;  which horse are you backing in this race?"
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Back as a verb (nautical, of the wind):
To change direction contrary to the normal pattern; that is, to shift anticlockwise in the northern hemisphere, or clockwise in the southern hemisphere.
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Back as a verb (nautical, of a square sail):
To brace the yards so that the wind presses on the front of the sail, to slow the ship.
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Back as a verb (nautical, of an anchor):
To lay out a second, smaller anchor to provide additional holding power.
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Back as a verb (UK, of a hunting dog):
To stand still behind another dog which has pointed.
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Back as a verb (transitive):
To push or force backwards.
Examples:
"to back oxen"
"The mugger backed her into a corner and demanded her wallet."
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Back as a verb (transitive, obsolete):
To get upon the back of; to mount.
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Back as a verb (transitive, obsolete):
To place or seat upon the back.
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Back as a verb:
To make a back for; to furnish with a back.
Examples:
"to back books"
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Back as a verb:
To adjoin behind; to be at the back of.
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Back as a verb:
To write upon the back of, possibly as an endorsement.
Examples:
"to back a letter;  to back a note or legal document"
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Back as a verb (legal, of a justice of the peace):
To sign or endorse (a warrant, issued in another county, to apprehend an offender).
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Back as a verb:
To row backward with (oars).
Examples:
"to back the oars"
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Back as a noun:
A large shallow vat; a cistern, tub, or trough, used by brewers, distillers, dyers, picklers, gluemakers, and others, for mixing or cooling wort, holding water, hot glue, etc.
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Back as a noun:
A ferryboat.
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Rear as a verb (transitive):
To bring up to maturity, as offspring; to educate; to instruct; to foster.
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Rear as a verb (transitive, said of people towards animals):
To breed and raise.
Examples:
"usex The family has been rearing cattle for 200 years."
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Rear as a verb (intransitive):
To rise up on the hind legs
Examples:
"usex The horse was shocked, and thus reared."
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Rear as a verb (intransitive, usually with "up"):
To get angry.
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Rear as a verb (intransitive):
To rise high above, tower above.
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Rear as a verb (transitive, literary):
To raise physically or metaphorically; to lift up; to cause to rise, to elevate.
Examples:
"Poverty reared its ugly head.'' gloss appeared, started, began to have an effect"
"The monster slowly reared its head."
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Rear as a verb (transitive, rare):
To construct by building; to set up
Examples:
"to rear defenses or houses"
"to rear one government on the ruins of another."
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Rear as a verb (transitive, rare):
To raise spiritually; to lift up; to elevate morally.
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Rear as a verb (transitive, obsolete):
To lift and take up.
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Rear as a verb (transitive, obsolete):
To rouse; to strip up.
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Rear as a verb (transitive):
To move; stir.
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Rear as a verb (transitive, of geese):
To carve.
Examples:
"Rere that goose!"
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Rear as a verb (regional, obsolete):
To revive, bring to life, quicken. (only in the phrase, to rear to life)
Examples:
"He healeth the blind and he reareth to life the dead. (Speculum Sacerdotale c. 15th century)"
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Rear as an adjective (now, _, chiefly, _, dialectal):
Underdone; nearly raw.
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Rear as an adjective (chiefly, _, US):
Rare.
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Rear as an adjective:
Being behind, or in the hindmost part; hindmost
Examples:
"usex the rear'' rank of a company"
"usex sit in the rear'' seats of a car"
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Rear as an adverb (British, dialect):
early; soon
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Rear as a noun:
The back or hindmost part; that which is behind, or last on order; - opposed to front.
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Rear as a noun (military):
Specifically, the part of an army or fleet which comes last, or is stationed behind the rest.
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Rear as a noun (anatomy):
The buttocks, a creature's bottom
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Rear as a verb:
To place in the rear; to secure the rear of.
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Rear as a verb (transitive, vulgar, British):
To sodomize