Meaning of the word "be keen on" in English

What does "be keen on" mean in English? Explore the meaning, pronunciation, and specific usage of this word with Lingoland.

be keen on

US /bi kin ɑn/
UK /bi kin ɒn/

Idiom

to be interested in something or someone, or to like doing something very much

Example:
She's really keen on playing tennis.
I'm not very keen on modern art.