Making little or no noise: quiet neighbors; a quiet engine. Free of loud noise; hushed: a quiet street. Calm and unmoving; still: a quiet lake. Free of turmoil and agitation; untroubled. See Synonyms at still1. Restful; soothing: a quiet afternoon nap; a quiet tune on the flute. Tranquil; serene: a quiet place in the country. Not showy or garish; subdued: a room decorated in quiet colors. Restrained in style; understated: a quiet strength; a quiet life. The quality or condition of being quiet: "A menacing quiet fills the empty streets\u201d ( Time). To cause to become quiet. Law To make (a title) secure by freeing from all questions or challenges. To become quiet: The child wouldn't quiet down for me.