1. Confirmative; ratifying; as, an act affirmative of common law.
2. That affirms; asserting that the fact is so; declaratory of what exists; answering yes to a question; opposed to negative; as, an affirmative answer; an affirmative vote.
3. Positive; dogmatic. Lysicles was a little by the affirmative air of Crito. (Berkeley)
4. (Science: logic) Expressing the agreement of the two terms of a proposition.
5. (Science: mathematics) Positive; a term applied to quantities which are to be added, and opposed to negative, or such as are to be subtracted.
Origin: L. Affirmativus: cf. F. Affirmatif.