Source : Webster's Revised Unabridged Dictionary (1913)

Adoptive \A*dopt"ive\, a. [L. adoptivus: cf. F. adoptif.]
   Pertaining to adoption; made or acquired by adoption; fitted
   to adopt; as, an adoptive father, an child; an adoptive
   language. -- {A*dopt"ive*ly}, adv.

Source : WordNet®

adoptive
     adj 1: of parents and children; related by adoption; "adoptive
            parents" [ant: {biological}]
     2: acquired as your own by free choice; "my adopted state"; "an
        adoptive country" [syn: {adopted}] [ant: {native}]