• imp. of Slee, to slay. Slew. • Moving a short space in a relatively long time; not swift; not quick in motion; not rapid; moderate; deliberate; as, a slow stream; a slow motion. • Not happening in a short time; gradual; late. • Not ready; not prompt or quick; dilatory; sluggish; as, slow of speech, and slow of tongue. • Not hasty; not precipitate; acting with deliberation; tardy; inactive. • Behind in time; indicating a time earlier than the true time; as, the clock or watch is slow. • Not advancing or improving rapidly; as, the slow growth of arts and sciences. • Heavy in wit; not alert, prompt, or spirited; wearisome; dull. • Slowly. • To render slow; to slacken the speed of; to retard; to delay; as, to slow a steamer. • To go slower; -- often with up; as, the train slowed up before crossing the bridge. • A moth.