'Complimentary' definitions:

Definition of 'complimentary'

From: WordNet
adjective
Conveying or resembling a compliment; "a complimentary remark" [ant: uncomplimentary]
adjective
Costing nothing; "complimentary tickets"; "free admission" [syn: complimentary, costless, free, gratis(p), gratuitous]

Definition of 'Complimentary'

From: GCIDE
  • Complimentary \Com`pli*men"ta*ry\, a. Expressive of regard or praise; of the nature of, or containing, a compliment; as, a complimentary remark; a complimentary ticket. "Complimentary addresses." --Prescott. [1913 Webster]