1. Adjective.  showing a quick and ardent willingness or responsiveness, enthusiastic, eager; interested, intense.
  2. Adjective.  vehement; fierce; as, a keen appetite.
  3. Adjective.  sharp; having a fine edge or point.
  4. Adjective.  acute of mind; sharp; penetrating; having or expressing mental acuteness.
  5. Adjective.  bitter; piercing; acrimonious; cutting; stinging; severe; as, keen satire or sarcasm.
  6. Adjective.  piercing; penetrating; cutting; sharp; -- applied to cold, wind, etc,; as, a keen wind; the cold is very keen.
  7. Adjective.  (context, often) Enthusiastic.
  8. Adjective.  (US, informal) Marvelous.
  9. Adjective.  (UK) extremely low as to be competitive.
  10. Adjective.  (obsolete) brave, courageous; bold, audacious.
  11. Verb.  (transitive, rare) To sharpen; to make cold.
  12. Noun.  A prolonged wail for a deceased person.
  13. Verb.  (intransitive) To utter a keen.
  14. Verb.  (transitive) To utter with a loud wailing voice or wordless cry.
  15. Verb.  (transitive) To mourn.

This is an unmodified, but possibly outdated, definition from Wiktionary and used here under the Creative Commons license. Wiktionary is a great resource. If you like it too, please donate to Wikimedia.

This entry was last updated on RefTopia from its source on 3/20/2012.