not

[not] /nɒt/

adverb

(used to express negation, denial, refusal, or prohibition):

You must not do that. It's not far from here.

U.S. Slang. (used jocularly as a postpositive interjection to indicate that a previous statement is untrue):

That's a lovely dress. Not!

Idioms

not so much, Informal. (an expression of dismissive scorn, ambivalence, or skepticism): Attractive? Yes. Smart? Not so much.

Is the world coming to an end? Yeah, not so much.

Origin

1275-1325; Middle English; weak variant of nought

Can be confused

knot, not.

not-

variant of noto- before a vowel.

NOT

[not] /nɒt/

noun

a Boolean operator that returns a positive result if its operand is negative and a negative result if its operand is positive.

Examples from the web for not

Experts say it's probably not the mattress that keeps you up at night.
Money can bring you happiness, studies show, but not as much as you might think.
Of course, if not done completely, the result is trans fat.
Also weird is that while borrowing from one language to another is common, borrowing grammar is not nearly as common.
In today's polarized climate, it is not uncommon to hear opposition to anything labeled climate-friendly or green.
not likely, but keep it in the back of your head as possible cause.
Growing underground, tubers are not limited by the rest of the plant.
Synthetic herbicides are not recommended for food gardens.
It's quite another to insist that it's not even a war.
But the headlines about the study did not always reflect that.

British Dictionary definitions for not

not

/nɒt/

adverb

used to negate the sentence, phrase, or word that it modifies: I will not stand for it
(in combination): they cannot go

(conjunction) not that, which is not to say or suppose that: I expect to lose the game — not that I mind Also (archaic) not but what

sentence substitute

used to indicate denial, negation, or refusal: certainly not

Word Origin

C14 not, variant of nought nothing, from Old English nāwiht, from nā no + wiht creature, thing. See naught, nought

not-

combining form

a variant of noto-

Word Origin and History for not

negative particle, mid-13c., unstressed variant of noht, naht "in no way" (see naught). As an interjection to negate what was said before or reveal it as sarcasm, it is first attested 1900; popularized 1989 by "Wayne's World" sketches on "Saturday Night Live" TV show. To not know X from Y (one's ass from one's elbow, shit from Shinola, etc.) was a construction first attested c.1930. Double negative construction not un- was derided by Orwell, but is persistent and ancient in English, popular with Milton and the Anglo-Saxon poets.

Slang definitions & phrases for not

not

negation

What has just been stated is emphatically not true: Millions of animals in experimental labs die annually. Shock value? NOT!/ Hooray for Pat Buchanan, not!/ Dan Quayle has already filmed a commercial declaring Murphy Brown his favorite show ...''not'' (1990s+)

not in Technology

logic
The Boolean function which is true only if its input is false. Its truth table is:
A | NOT A --+---------- F | T T | F
(1996-11-04)

Idioms and Phrases with not