Taking a long time to move or go a short distance; not quick in motion; not rapid: as, a slow train; a slow messenger.Not happening in a short time; spread over a comparatively long time; gradual: as, a slow change; the slow growth of arts.Not ready; not prompt or quick; used absolutely, not quick to comprehend; dull-witted.Tardy; dilatory; sluggish; slothful.Not hasty; not precipitate; acting with deliberation.Behind in time; indicating a time earlier than the true time: as, the clock or watch is slow.Dull; lacking spirit; deficient in liveliness or briskness: used of persons or things: as, the entertainment was very slow.Synonyms Delaying, lingering, deliberate.3 andHeavy, inert, lumpish.1–4. Slow, Tardy, Dilatory. Slow and tardy represent either a fact in external events or an element of character; dilatory only the latter. Dilatory expresses that disposition or habit by which one is once or generally slow to go about what ought to be done. See idle.n. A sluggard.Slowly.To become slow; slacken in speed.To make slow; delay; retard.To slacken in speed: as, to slow a locomotive or a steamer: usually with up or down.n. A Middle English spelling of slough.n. In zoöl, a sluggish or slow-paced skink, as the slow-worm or blindworm, Anguis fragilis; also, a newt or eft of like character.n. A Middle English preterit of slay.