1. eagerness or enthusiasm for something
2. sharpness of mind or perception; mental acuity
3. the quality of having a sharp edge or point

Examples

• Her keenness for learning new languages impressed her teachers.
• The student’s keenness to participate in every activity was remarkable.
• His keenness of observation helped him notice details others missed.
• The detective’s keenness of mind solved the case quickly.
• The keenness of the blade made cutting effortless.
• She showed great keenness in pursuing her career goals.
• The keenness of his wit made him popular at parties.