1. the flat cutting part of a knife, sword, or other tool or weapon
2. a single piece of grass or a similar long narrow leaf
3. the flat part of an oar, propeller, or similar device

Examples

• The knife blade was sharp enough to cut through the rope.
• She carefully sharpened the blade of her sword.
• A single blade of grass poked through the snow.
• The lawn mower cut each blade evenly.
• The oar blade sliced through the water smoothly.
• He replaced the damaged blade on his ice skates.
• The propeller blade was bent from the impact.