(a) Lacking in sense, judgment, or discretion; foolish, imprudent; also, characterized by a lack of sense, judgment, or discretion; also in proverbs; of an animal: lacking the faculty of reason; ~ man; (b) lacking knowledge, education, or practical experience; ignorant, untaught, uninformed; unskilled, unskillful, incompetent; also, of medical or cosmetic procedures: characterized by a lack of skill, experience, or knowledge on the part of the practitioner, ill-conceived, inept; (c) as noun: one who is foolish or ignorant;—also coll.; the unwiser, the less intelligent ants; (d) as adv.: in a foolish manner; (e) of myths or tales: ?far-fetched, implausible; ?consisting of artifice only.