The meaning of KEEN is intellectually alert : having or characteristic of a quick penetrating mind; also : shrewdly astute. How to use keen in a sentence. Synonym Discussion of Keen.

Keen commonly means eager, interested, or enthusiastic. This sense of the word is often followed by about or on and the particular interest, as in He’s very keen on music.

Keen is an adjective that describes something that is intense, sharp, or focused. The word keen comes from the Old English word cene that translates to "bold and brave" and while the spelling is now …

If you describe someone as keen, you mean that they have an enthusiastic nature and are interested in everything that they do. He's a very keen student and works very hard. You're all very keen.

1. finely sharpened; so shaped as to cut or pierce readily: a keen razor. 2. sharp, piercing, or biting: a keen wind. 3. acutely or finely perceptive; extremely sensitive, responsive, or alert: keen ears; a keen …

Definition of keen adjective in Oxford Advanced Learner's Dictionary. Meaning, pronunciation, picture, example sentences, grammar, usage notes, synonyms and more.

characterized by strength and distinctness of perception; extremely sensitive or responsive: keen eyes; keen ears. having or showing great mental penetration or acumen: keen reasoning; a keen mind. …