1. The flat-edged cutting part of a sharpened weapon or tool.

2. a. A sword. b. A swordsman.

3. A dashing youth.

4. A flat, thin part or section: the blade of an oar; the blade of a food processor.

5. The metal runner of an ice skate.

6. A wide flat bone or bony part.

7. The flat upper surface of the tongue just behind the tip.

8. Botany. The expanded part of a leaf or petal. The term is often loosely used to include the entire leaf of grasses and similar plants.