keen Definition in the Cambridge English Dictionary
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Definition of “keen” - English Dictionary

Definition of "keen" - American English Dictionary

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keenadjective [-er/-est only]

 us   /kin/

keen adjective [-er/-est only] (STRONGLY FELT)

(esp. of ​emotions and ​beliefs) ​stronglyfelt: a keen ​interest in ​painting

keen adjective [-er/-est only] (DEVELOPED)

(of an ​awareness or ​ability) very ​developed, or (of the ​mind) very ​quick to ​understand: a keen ​eye for ​detail a keen ​sense of ​smell

keen adjective [-er/-est only] (EAGER)

eager, ​interested, and ​enthusiastic: Theresa isn’t too keen on ​pets.
(Definition of keen from the Cambridge Academic Content Dictionary © Cambridge University Press)

Definition of "keen" - British English Dictionary

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keenadjective

uk   us   /kiːn/

keen adjective (EAGER)

B1 very ​interested, ​eager, or ​wanting (to do) something very much: They were very keen tostartwork as ​soon as ​possible. Joan ​wanted to go to a ​movie but I wasn't keen (= I didn't ​want to go). She's a keen ​tennisplayer She's keen on (​playing) ​tennis.UK My son's mad keen on ​cycling. He's ​rather keen on a ​girl in his ​school (= he is very ​attracted to her).
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keen adjective (STRONG)

extreme or very ​strong: Many ​people are taking a keen interest (= a very ​greatinterest) in the ​result of the ​vote.C1 very good or well ​developed: a keen ​sense of ​smell

keen adjective (SHARP)

literary very ​sharp: a keen ​northwind
keenly
adverb uk   us   /ˈkiːn.li/
They are keenly (= ​extremely) aware that this will be ​their last ​chance to ​succeed.

keenverb [I]

uk   us   /kiːn/ literary
to make a ​loud, ​long, ​sadsound, ​especially because someone has ​died
keenness
noun [U] uk   us   /ˈkiːn.nəs/
the ​quality of being keen
(Definition of keen from the Cambridge Advanced Learners Dictionary & Thesaurus © Cambridge University Press)

Definition of "keen" - Business English Dictionary

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keenadjective

uk   us   /kiːn/
if ​competition between ​people or ​businesses is keen, they are using a lot of ​effort to be more ​successful than the others: Some ​firms are ​diversifying their ​businesses in ​response to keen ​competition.
UK if ​prices are keen, they are ​lower and ​offer more ​value than others: Superstores may ​offer keen ​prices that small-town ​shops cannot ​match.
UK very interested in something or eager to do something: A keen ​member of two ​localinvestmentclubs, he ​runsportfolios of ​shares for both himself and his wife.a keen interest in sth Among the foundation's ​donors are ​corporations with a keen ​interest in ​issues before the ​legislature.keen on sth Like every ​banker these days, he is keen on ​managing other people's ​wealth.keen to do sth The ​company is keen to ​expand beyond the UK.
(Definition of keen from the Cambridge Business English Dictionary © Cambridge University Press)
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