1432, from M.L. summarius "of or pertaining to the sum or substance," from L. summa "whole, gist" (see sum). Sense of "done promptly" is first found 1713. The noun meaning "a summary statement or account" is first recorded 1509, from L. summarium "an epitome, abstract, summary," from summa "totality, gist." Summarily is attested from 1528. Summarize first recorded 1871.