Adopt  v. 1 legally take (a person) into a relationship, esp. Another's child as one's own. 2 choose (a course of action etc.). 3 take over (another's idea etc.). 4 choose as a candidate for office. 5 accept responsibility for the maintenance of (a road etc.). 6 accept or approve (a report, accounts, etc.).  adoption n. [latin: related to *ad-, *opt]