The flat cutting part of a sharpened weapon or tool. A sword. A swordsman. Archaeology A slender, sharp-edged flake that is at least twice as long as it is wide. A dashing youth. A flat thin part or section, especially one that makes contact to perform a desired action: the blade of an oar; the blade of a hockey stick. An arm of a rotating mechanism: the blade of a propeller; the blade of food processor. A long, thin, often curved piece, as of metal or rubber, used for plowing, clearing, or wiping. The metal runner of an ice skate. A wide flat bone or bony part. The flat upper surface of the tongue just behind the tip. Botany The expanded part of a leaf or petal. Botany The leaf of grasses or similar plants. To skate on in-line skates.