adjective
definition
Often with a prepositional phrase, or with to and an infinitive: showing a quick and ardent responsiveness or willingness; eager, enthusiastic, interested.
example
I’m keen on computers.
definition
Fierce, intense, vehement.
example
This boy has a keen appetite.
definition
Having a fine edge or point; sharp.
definition
Acute of mind, having or expressing mental acuteness; penetrating, sharp.
definition
Acrimonious, bitter, piercing.
example
keen satire or sarcasm
definition
Of cold, wind, etc.: cutting, penetrating, piercing, sharp.
example
a keen wind
definition
Of prices, extremely low as to be competitive.
definition
Marvelous.
example
I just got this peachy keen new dress.
definition
Brave, courageous; audacious, bold.