Definitions from Wiktionary (Keen)

▸ adjective:  (chiefly Commonwealth) Often with a prepositional phrase, or with to and an infinitive: showing a quick and ardent responsiveness or willingness; eager, enthusiastic, interested.
▸ adjective:  Fierce, intense, vehement.
▸ adjective:  Having a fine edge or point; sharp.
▸ adjective:  Acute of mind, having or expressing mental acuteness; penetrating, sharp.
▸ adjective:  Acrimonious, bitter, piercing.
▸ adjective:  Of cold, wind, etc.: cutting, penetrating, piercing, sharp.
▸ adjective:  (British) Of prices, extremely low as to be competitive.
▸ adjective:  (US, informal, dated) Marvelous.
▸ adjective:  (obsolete) Brave, courageous; audacious, bold.
▸ verb:  (transitive, rare) To make cold, to sharpen.
▸ noun:  A prolonged wail for a deceased person.
▸ verb:  (intransitive) To utter a keen.
▸ verb:  (transitive) To utter with a loud wailing voice or wordless cry.
▸ verb:  (transitive) To mourn.
▸ noun:  A surname.
▸ Also see keen

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