The difference between Dead and Extinct
When used as verbs, dead means to prevent by disabling, whereas extinct means to make extinct.
When used as adjectives, dead means no longer living, whereas extinct means extinguished, no longer alight (of fire, candles etc.).
Dead is also noun with the meaning: time when coldness, darkness, or stillness is most intense.
Dead is also adverb with the meaning: exactly.
check bellow for the other definitions of Dead and Extinct
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Dead as an adjective (not comparable):
No longer living.
Examples:
"All of my grandparents are dead."
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Dead as an adjective (hyperbole):
Figuratively, not alive; lacking life.
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Dead as an adjective (of another person):
So hated that they are absolutely ignored.
Examples:
"He is dead to me."
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Dead as an adjective:
Doomed; marked for death (literally or as a hyperbole).
Examples:
"You come back here this instant! Oh, when I get my hands on you, you're dead, mister!"
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Dead as an adjective:
Without emotion.
Examples:
"She stood with dead face and limp arms, unresponsive to my plea."
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Dead as an adjective:
Stationary; static.
Examples:
"the dead load on the floor"
"a dead lift"
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Dead as an adjective:
Without interest to one of the senses; dull; flat.
Examples:
"'dead air"
"a dead glass of soda."
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Dead as an adjective:
Unproductive.
Examples:
"'dead time"
"'dead fields"
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Dead as an adjective (not comparable, of a machine, device, or electrical circuit):
Completely inactive; currently without power; without a signal.
Examples:
"OK, the circuit's dead. Go ahead and cut the wire."
"Now that the motor's dead you can reach in and extract the spark plugs."
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Dead as an adjective (of a battery):
Unable to emit power, being discharged (flat) or faulty.
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Dead as an adjective (not comparable):
Broken or inoperable.
Examples:
"That monitor is dead; don’t bother hooking it up."
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Dead as an adjective (not comparable):
No longer used or required.
Examples:
"There are several dead laws still on the books regulating where horses may be hitched."
"Is this beer glass dead?"
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Dead as an adjective (engineering):
Not imparting motion or power by design.
Examples:
"the dead spindle of a lathe"
"A [[dead axle]], also called a lazy axle, is not part of the drivetrain, but is instead free-rotating."
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Dead as an adjective (not comparable, sports):
Not in play.
Examples:
"Once the ball crosses the foul line, it's dead."
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Dead as an adjective (not comparable, golf, of a golf ball):
Lying so near the hole that the player is certain to hole it in the next stroke.
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Dead as an adjective (not comparable, baseball, slang, 1800s):
Tagged out.
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Dead as an adjective (not comparable):
Full and complete.
Examples:
"'dead stop"
"'dead sleep"
"'dead giveaway"
"'dead silence"
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Dead as an adjective (not comparable):
Exact.
Examples:
"'dead center"
"'dead aim"
"a dead eye"
"a dead level"
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Dead as an adjective:
Experiencing pins and needles (paresthesia).
Examples:
"After sitting on my hands for a while, my arms became dead."
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Dead as an adjective:
Constructed so as not to transmit sound; soundless.
Examples:
"a dead floor"
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Dead as an adjective (obsolete):
Bringing death; deadly.
Examples:
"rfquotek Shakespeare"
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Dead as an adjective (legal):
Cut off from the rights of a citizen; deprived of the power of enjoying the rights of property.
Examples:
"A person who is banished or who becomes a monk is civilly dead."
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Dead as an adverb (degree, informal, colloquial):
Exactly.
Examples:
"dead right''; ''dead level''; ''dead flat''; ''dead straight''; ''dead left"
"He hit the target dead in the centre."
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Dead as an adverb (degree, informal, colloquial):
Very, absolutely, extremely.
Examples:
"dead wrong''; ''dead set''; ''dead serious''; ''dead drunk''; ''dead broke''; ''dead earnest''; ''dead certain''; ''dead slow''; ''dead sure''; ''dead simple''; ''dead honest''; ''dead accurate''; ''dead easy''; ''dead scared''; ''dead solid''; ''dead black''; ''dead white''; ''dead empty"
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Dead as an adverb:
Suddenly and completely.
Examples:
"He stopped dead."
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Dead as an adverb (informal):
As if dead.
Examples:
"dead tired''; ''dead quiet''; ''dead asleep''; ''dead pale''; ''dead cold''; ''dead still"
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Dead as a noun (uncountable, singulare tantum, often with "the"):
Time when coldness, darkness, or stillness is most intense.
Examples:
"The dead of night.'' ''The dead of winter."
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Dead as a noun (plural, with "the", a demonstrative, or a possessive):
Those who have died.
Examples:
"Have respect for the dead."
"The villagers are mourning their dead."
"The dead are always with us, in our hearts."
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Dead as a verb (transitive):
To prevent by disabling; stop.
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Dead as a verb (transitive):
To make dead; to deaden; to deprive of life, force, or vigour.
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Dead as a verb (UK, transitive, slang):
To kill.
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Extinct as an adjective (dated):
Extinguished, no longer alight (of fire, candles etc.)
Examples:
"Poor Edward's cigarillo was already extinct."
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Extinct as an adjective:
No longer used; obsolete, discontinued.
Examples:
"The title became extinct when the last baron died."
"Luckily, such ideas about race are extinct in current sociological theory."
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Extinct as an adjective:
No longer in existence; having died out.
Examples:
"The dinosaurs have been extinct for millions of years."
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Extinct as an adjective (vulcanology):
No longer actively erupting.
Examples:
"Most of the volcanos on this island are now extinct."
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Extinct as a verb (transitive):
To make extinct; to extinguish or annihilate.