Meaning of the word "have a keen interest in" in English

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

have a keen interest in

US /hæv ə kiːn ˈɪn.trəst ɪn/
UK /hæv ə kiːn ˈɪn.trəst ɪn/

Phrase

to be very interested in something

Example:
She has a keen interest in ancient history.
Many students have a keen interest in environmental issues.