Keen | Mean of keen in English Dictionary

/ˈkiːn/

• having or showing an ability to think clearly and to understand what is not obvious or simple about something
1. a keen intellect/intelligence/mind
2. She's a very keen observer of the political world.
3. She made some keen [=acute] observations.
4. a keen wit
• very strong and sensitive
1. The dog has a keen sense of smell. = The dog has a keen nose.
2. keen [=acute] eyesight/hearing
3. She had a keen awareness of what was happening. [=she knew exactly what was happening]
4. She has a keen ear for languages. [=she is able to easily learn and understand languages]
5. He has a keen eye for details. [=he is good at noticing details]
• very excited about and interested in something
1. She's a keen tennis player. = She's keen about tennis.
2. He's a keen student of art history. = He has a keen interest in art history.

• feeling a strong and impatient desire to do something
1. He is keen [=eager] to learn more about art history.
• strong or intense
1. After his death, she felt a keen [=profound] sense of loss.
2. The two firms are in keen competition.
3. (chiefly Brit) a keen wind
• very good
1. Gee, that's keen.
• having a sharp edge or point
1. a keen knife/sword
• very low
1. They sell reliable products at very keen prices.
• very excited and interested
1. I gave him the job because he was willing to learn and seemed as keen as mustard.
• very excited about and interested in (something)
1. She's very keen on tennis.
2. I'm not keen on that idea. [=I don't like that idea]
3. (Brit) He's mad keen on golf.
• interested in or attracted to (someone)
1. He's been very keen on her since they met at my party.
• Verb
• to make a loud and long cry of sorrow
1. mourners keening at a funeral