'affirmative' definitions:

Definition of 'affirmative'

From: WordNet
adjective
Affirming or giving assent; "an affirmative decision"; "affirmative votes" [syn: affirmative, affirmatory] [ant: negative]
adjective
Expecting the best; "an affirmative outlook" [syn: affirmative, optimistic]
adjective
Expressing or manifesting praise or approval; "approbative criticism"; "an affirmative nod" [syn: approving, affirmative, approbative, approbatory, plausive]
noun
A reply of affirmation; "he answered in the affirmative" [ant: negative]

Synonyms of 'affirmative'

From: Moby Thesaurus