Word Origin & History
brief (adj.)
1292, from L. brevis (adj.) "short, low, little, shallow," from PIE *bregh- "cut, beat, beat (out)" (cf. Gk. brakhys "short," O.C.S. bruzeja "shallow places, shoals"). Noun derivative breve (gen. brevis) meant "letter, summary" (specifically a letter of the pope, less ample and solemn than a bull), and came to mean "letter of authority," which yielded the modern, legal sense of "summary of the facts of a case" (1631). The verb meaning "to give instructions or information to" (1866) was originally "to instruct by a brief" (1862); hence briefing, first attested 1910 but popularized by WWII pre-flight conferences. Briefs "short, tight underwear" is from 1934.