(1):
(n.) A prolonged wail for a deceased person. Cf. Coranach.
(2):
(v. i.) To wail as a keener does.
(3):
(v. t.) To sharpen; to make cold.
(4):
(superl.) Sharp; having a fine edge or point; as, a keen razor, or a razor with a keen edge.
(5):
(superl.) Bitter; piercing; acrimonious; cutting; stinging; severe; as, keen satire or sarcasm.
(6):
(superl.) Piercing; penetrating; cutting; sharp; - applied to cold, wind, etc,; as, a keen wind; the cold is very keen.
(7):
(superl.) Eager; vehement; fierce; as, a keen appetite.
(8):
(superl.) Acute of mind; sharp; penetrating; having or expressing mental acuteness; as, a man of keen understanding; a keen look; keen features.