Cambridge Dictionaries online Cambridge Dictionaries online

The most popular online dictionary and thesaurus for learners of English

English definition of “keen”

See all translations

keen

adjective uk   /kiːn/ us  

keen adjective (EAGER)

B1 very interested, eager, or wanting (to do) something very much: They were very keen to start work 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 tennis player 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).
More examples

keen adjective (STRONG)

extreme or very strong: Many people are taking a keen interest (= a very great interest) 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 north wind
keenly
adverb uk   /ˈkiːn.li/ us  
They are keenly (= extremely) aware that this will be their last chance to succeed.

keen

verb [I] uk   /kiːn/ literary us  
to make a loud, long, sad sound, especially because someone has died
keenness
noun [U] uk   /ˈkiːn.nəs/ us  
the quality of being keen
(Definition of keen from the Cambridge Advanced Learners Dictionary & Thesaurus © Cambridge University Press)
What is the pronunciation of keen?
Add Cambridge dictionaries to your browser to your website

Definitions of “keen” in other dictionaries

Word of the Day

sail

When a boat or a ship sails, it travels on the water.

Word of the Day

Byronic, Orwellian and Darwinian: adjectives from names.

by Liz Walter,
April 15, 2015
Becoming an adjective is a strange kind of memorial, but it is often a sign of a person having had real influence on the world. Science is full of examples, from Hippocrates, the Greek medic born around 460 BC, who gave his name to the Hippocratic Oath still used by doctors today,

Read More 

dumbwalking noun

April 20, 2015
walking slowly, without paying attention to the world around you because you are consulting a smartphone He told me dumbwalking probably wouldn’t be a long-term problem.

Read More