[keen] 
| 1. | finely sharpened, as an edge; so shaped as to cut or pierce substances readily: a keen razor. |
| 2. | sharp, piercing, or biting: a keen wind; keen satire. |
| 3. | characterized by strength and distinctness of perception; extremely sensitive or responsive: keen eyes; keen ears. |
| 4. | having or showing great mental penetration or acumen: keen reasoning; a keen mind. |
| 5. | animated by or showing strong feeling or desire: keen competition. |
| 6. | intense, as feeling or desire: keen ambition; keen jealousy. |
| 7. | eager; interested; enthusiastic (often fol. by about, on, etc., or an infinitive): She is really keen on going swimming. |
| 8. | Slang. great; wonderful; marvelous. |
