■ adverb
1》 (also n't joined to a preceding verb) used chiefly with an auxiliary verb or ‘be’ to form the negative.
2》 used as a short substitute for a negative clause.
3》 used to express the negative of other words.
↘used with a quantifier to exclude a person or part of a group.
↘less than.
4》 used in understatements to suggest that the opposite of a following word or phrase is true: ~ a million miles away.
↘ informal, humorous following and emphatically negating a statement: that sounds like quality entertainment—~!
■ noun ( NOT )
1》 a logical operation which gives the value zero if the operand is one, and vice versa.
2》 [as modifier ] Electronics de~ing a gate circuit which produces an output only when there is no input signal.
Origin
ME: contr. of nought .