The difference between Natural and Necessary
When used as nouns, natural means a native inhabitant of a place, country etc, whereas necessary means a place to do the "necessary" business of urination and defecation: an outhouse or lavatory.
When used as adjectives, natural means that exists and evolved within the confines of an ecosystem, whereas necessary means required, essential, whether logically inescapable or needed in order to achieve a desired result or avoid some penalty.
check bellow for the other definitions of Natural and Necessary
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Natural as an adjective:
That exists and evolved within the confines of an ecosystem.
Examples:
"The species will be under threat if its natural habitat is destroyed."
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Natural as an adjective:
Of or relating to nature.
Examples:
"In the natural world the fit tend to live on while the weak perish."
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Natural as an adjective:
Without artificial additives.
Examples:
"'Natural food is healthier than processed food."
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Natural as an adjective:
As expected; reasonable.
Examples:
"It's natural for business to be slow on Tuesdays."
"His prison sentence was the natural consequence of a life of crime."
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Natural as an adjective (music):
Neither sharp nor flat. Denoted ♮.
Examples:
"There's a wrong note here: it should be C natural instead of C sharp."
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Natural as an adjective (music):
Produced by natural organs, such as those of the human throat, in distinction from instrumental music.
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Natural as an adjective (music):
Applied to an air or modulation of harmony which moves by easy and smooth transitions, digressing but little from the original key.
Examples:
"rfquotek Moore (Encyc. of Music)"
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Natural as an adjective (math):
Having 1 as the base of the system, of a function or number.
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Natural as an adjective (dice):
Without, or prior to, modification or adjustment. The result of a dice roll before bonuses or penalties are added to or subtracted from the result.
Examples:
"the natural motion of a gravitating body"
"The chairs were all natural oak but the table had a lurid finish."
"So-called second-generation [[w:Breast implant silicone breast implants]] looked and felt more like the natural breast."
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Natural as an adjective:
Having the character or sentiments properly belonging to one's position; not unnatural in feelings.
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Natural as an adjective (obsolete):
Connected by the ties of consanguinity.
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Natural as an adjective (obsolete):
Born out of wedlock; illegitimate; bastard.
Examples:
"a natural child"
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Natural as an adjective (of sexual intercourse):
Without a condom.
Examples:
"We made natural love."
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Natural as a noun (now, _, rare):
A native inhabitant of a place, country etc.
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Natural as a noun (music):
A note that is not or is no longer to be modified by an accidental, or the symbol ♮ used to indicate such a note.
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Natural as a noun:
One with an innate talent at or for something.
Examples:
"He's a natural on the saxophone."
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Natural as a noun:
An almost white colour, with tints of grey, yellow or brown; originally that of natural fabric.
Examples:
"color paneFAD6A5"
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Natural as a noun (archaic):
One with a simple mind; a fool or idiot.
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Natural as a noun (colloquial, chiefly, _, UK):
One's natural life.
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Natural as a noun (US, colloquial):
A hairstyle for people with afro-textured hair in which the hair is not straightened or otherwise treated.
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Natural as a noun (algebra):
Closed under submodules, direct sums, and injective hulls.
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Necessary as an adjective:
Required, essential, whether logically inescapable or needed in order to achieve a desired result or avoid some penalty.
Examples:
"Although I wished to think that all was false, it was yet [[necessary]] that that I, who thus thought, must in some sense exist."
"It is absolutely [[necessary]] that you call and confirm your appointment."
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Necessary as an adjective:
Unavoidable, inevitable.
Examples:
"If it is absolutely [[necessary]] to use public computers, you should plan ahead and forward your e-mail to a temporary, disposable account."
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Necessary as an adjective (obsolete):
Determined, involuntary: acting from compulsion rather than free will.
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Necessary as a noun (UK, archaic, _, euphemism, usually with the definite article):
A place to do the "necessary" business of urination and defecation: an outhouse or lavatory.