not

Definition of Not in English :

1. non, not

negation of a word or group of words

Example Sentences:
'he does not speak French'
'she is not going'
'they are not friends'
'not many'
'not much'
'not at all'

WordNet Lexical Database for English. Princeton University. 2010.

Not

adverb

1.

a.

used to negate the sentence, phrase, or word that it modifies

I will not stand for it

b.

(in combination)

they cannot go

2. not that

sentence substitute

3.

used to indicate denial, negation, or refusal

certainly not

adverb

in no manner; to no degree

a particle of negation, or word expressing the idea of no, often implying refusal, affirmation of the opposite, etc.: sometimes used elliptically

whether you like it or not

n.

A logical operator that returns a false value if the operand is true and a true value if the operand is false.

adv.

In no way; to no degree. Used to express negation, denial, refusal, or prohibition: I will not go. You may not have any.