The meaning of Not

adverb

Used with an auxiliary verb or ‘be’ to form the negative.

Usage examples:

He would not say

adverb

Used as a short substitute for a negative clause.

Usage examples:

Maybe i'll regret it, but i hope not

adverb

Used to express the negative of other words.

Usage examples:

Not a single attempt was made

adverb

Used in understatements to suggest that the opposite of a following word or phrase is true.

Usage examples:

The not too distant future

noun

A boolean operator with only one variable that has the value one when the variable is zero and vice versa.

adjective

(of paper) not hot-pressed, and having a slightly textured surface.

adverb

Used to make a word or group of words negative, or to give a word or words an opposite meaning

Usage examples:

Her life was not happy., if it’s not yours, whose is it?, he’s not bad-looking (= he is attractive)…