mid-15c., from Latin consummatus "perfected, complete," past participle of consummare "sum up, complete" (see consummation). Of persons, "accomplished, very qualified," from 1640s. Related: Consummately.
1520s, "to bring to completion," from Latin consummatus, past participle of consummare "to sum up, make up, complete, finish" (see consummation). Meaning "to bring a marriage to completion" (by sexual intercourse) is from 1530s. Related: Consummated; consummating.