adj.
  - agreeing with or consenting to a statement or request. 
▸Grammar  & Logic  stating that a fact is so. Contrasted with negative and interrogative.
 - denoting proposed legislation which must receive an affirmative parliamentary vote before it can come into force.
 
n.
 an affirmative statement or word. 
▸Logic  a statement asserting that something is true of the subject of a proposition.
exclam.
 chiefly N. Amer. yes.
 
  Phrase
  
    
      - in the affirmative
 so as to accept or agree to a statement or request. 
    
   
  Derivative
  
  Etymology
  ME (in the sense ‘assertive, positive’): via OFr. from late L. affirmativus, from affirmare (see affirm).