Definition of "affirmative"

affirmative

/əˈfɜːmətɪv/

adjective
comparative more affirmative, superlative most affirmative
1. pertaining to truth; asserting that something is; affirming
2. pertaining to any assertion or active confirmation that favors a particular result
3. positive
4. Confirmative; ratifying.
5. Dogmatic.
  Quotations
  Lyſicles vvas a little diſconcerted by the affirmative air of Crito; but after a ſhort pauſe replied briskly, […]
  1732, George Berkeley, “The Second Dialogue”, in Alciphron: Or, The Minute Philosopher. […], volume I, London: […] J[acob] Tonson […], section IX, page 92
6. (logic) Expressing the agreement of the two terms of a proposition.
7. (algebra) positive; not negative
noun
plural affirmatives
1. Yes; an answer that shows agreement or acceptance.
2. (grammar) An answer that shows agreement or acceptance.
3. (obsolete) An assertion.
  Quotations
  that every hare is both male and female, beside the vulgar opinion, was the affirmative of Archelaus, of Plutarch, Philostratus, and many more.
  1646, Sir Thomas Browne, Pseudodoxia Epidemica, III.17
interjection
1. Yes.
2. (military, especially radio communications) Yes; true; correct.