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English definition of “keen”

keen

adjective (STRONG)    /kiːn/
extreme or very strong: Many people are taking a keen interest (= a very great interest) in the result of the vote.Having a powerful effectStrong feelingsVery and extreme C1 very good or well developed: a keen sense of smellExtremely good keenly     /ˈkiːn.li/ adverb They are keenly (= extremely) aware that this will be their last chance to succeed.Physically strong and powerful
(Definition of keen adjective (STRONG) from the Cambridge Advanced Learner's Dictionary & Thesaurus © Cambridge University Press)
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