Acting, happening, or moving quickly; fast, rapid, swift; also, abrupt, sudden, unexpected.
No example sentence was provided for this meaning.
Meaning relationships
Synonyms: cursory, express, fast, expeditious, feverish, fleet, fleeting, greased lightning, hasty, hectic, hectical, hyperactive, immediate, lightning fast, nimble, post haste, precipitant, quick, quick as a flash, quicksome, rapid, speedful, speedy, spit-spot, swift, tripsome, zippy, precipitous, abrupt, precipitate, spontaneous, subitaneous, sudden, suddent
Antonyms: crawling, slack, slow-moving, languid, languorous, draggy, tardy, creeping, dreich, gastropodous, glacial, heavy-footed, inching, inert, labored, leaden, lead-footed, lethargic, low-speed, lumbering, plodding, pokey, ponderous, slothlike, slow, slow as a snail, slow as Christmas, slow as molasses, slow as molasses in January, slowfooted, sluggish, stately, steady, subglacial, sullen, tardigrade, tedious, testudineous, torpid, turtleish, turtlesque, unspeedy