adoptive Get Printable Handwriting (a-dop-tive) 3 syllables Rhymes Learn It! Spelling Test Definition adjective. having to do with a legal proceeding that creates a parentchild relation between persons not related by blood; Example Sentence Her adoptive parents loved her very much. Synonyms foster; surrogate; adopted Antonyms begotten; natural Rhymes Three Syllable Rhymes (1) adoptive Share with your friends: