From Longman Dictionary of Contemporary Englishkeenkeen1 /kiːn/ ●●○S3W3 adjective 🔊 🔊 1want something especially British Englishwanting to do something or wanting something to happen very much syn eagerkeen to do something 🔊 He told me that he was keen to help.keen on doing something 🔊 I wasn’t keen on going there on my own.keen for something to happen 🔊 The government is keen for peace talks to start again.keen that 🔊 The chairman is keen that the company should expand its product range.2 →be keen on somebody/something3hobby/interest especially British EnglishENJOY/LIKE DOING somethingENTHUSIASTIC someone who is keen on something is very interested in it or enjoys doing it very much 🔊 a keen photographer 🔊 keen golferskeen on 🔊 Daniel’s very keen on tennis.mad keen on something (=very keen on something) spoken 🔊 I was mad keen on dinosaurs when I was little. 🔊 She takes a keen interest in politics and current affairs.4eager to work/learn someone who is keen is eager to work or learn, and enjoys doing it 🔊 keen students 🔊 The kids in my class are all very keen. 🔊 She was new in the job and keen as mustard (=very keen).5sight/smell/hearingGOOD/EXCELLENT a keen sense of smell or keen sight or hearing is an extremely good ability to smell etc 🔊 Dogs have a very keen sense of smell. 🔊 She has a keen eye for (=is good at noticing) talent.6mindINTELLIGENT someone with a keen mind is quick to understand things 🔊 a keen understanding of commerce 🔊 With her keen mind and good business sense, she soon became noticed.7feeling a keen feeling is one that is strong and deep 🔊 As she walked away, Joe felt a keen sense of loss.8competitionCOMPETE WITH/TRY TO BEAT used to describe a situation in which people compete strongly 🔊 We won the contest in the face of keen competition.9 →be keen on somebody10sharp literarySHARP a keen knife or blade is extremely sharp11wind old-fashionedCOLD a keen wind is cold and strong12prices British English keen prices are low —keenly adverb 🔊 I was keenly aware of the dangers. —keenness noun [uncountable]GrammarYou are keen on something or keen on doing something: We’re all very keen on sports.✗Don’t say: We’re all very keen of sports.