A blade is a very sharp metal edge of a tool. A good cooking knife should have its blade sharpened regularly.

Knives, swords, and razors have blades, metal edges so fine and thin that they can cut and slice. The shoulder bone is sometimes called a "shoulder blade," and a piece of grass is also a blade. In fact, the original meaning of the Old English blæd was "leaf," and then "something resembling a leaf." In the 14th century, the word was applied to swords, based on their shape — similar to a leaf or blade of grass.

Definitions of blade
  1. noun
    the flat part of a tool or weapon that (usually) has a cutting edge
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    knife blade
    the blade of a knife
    a blade that has very sharp edge
    type of:
    cutting implement
    a tool used for cutting or slicing
  2. noun
    flat surface that rotates and pushes against air or water
    synonyms: vane
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    fan blade
    blade of a rotating fan
    the blade of a rotor (as in the compressor of a jet engine)
    a blade of a paddle wheel or water wheel
    rudder blade
    the vertical blade on a rudder
    type of:
    rotating mechanism
    a mechanism that rotates
  3. noun
    the part of the skate that slides on the ice
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    type of:
    device consisting of the parts on which something can slide along
  4. noun
    a cutting or thrusting weapon that has a long metal blade and a hilt with a hand guard
    synonyms: brand, steel, sword
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    the legendary sword of King Arthur
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    a sword with only one cutting edge
    a sword with a broad blade and (usually) two cutting edges; used to cut rather than stab
    cavalry sword, saber, sabre
    a stout sword with a curved blade and thick back
    cutlas, cutlass
    a short heavy curved sword with one edge; formerly used by sailors
    a short broad slightly convex medieval sword with a sharp point
    fencing sword
    a sword used in the sport of fencing
    rapier, tuck
    a straight sword with a narrow blade and two edges
    a large double-edged broadsword; formerly used by Scottish Highlanders
    a fencing sword similar to a foil but with a heavier blade
    a light slender flexible sword tipped by a button
    saber, sabre
    a fencing sword with a v-shaped blade and a slightly curved handle
    a curved saber used in Eastern countries; the edge is on the convex side of the blade
    type of:
    arm, weapon, weapon system
    any instrument or instrumentality used in fighting or hunting
  5. noun
    especially a leaf of grass or the broad portion of a leaf as distinct from the petiole
    synonyms: leaf blade
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    type of:
    foliage, leaf, leafage
    the main organ of photosynthesis and transpiration in higher plants
  6. noun
    something long and thin resembling a blade of grass
    “a blade of lint on his suit”
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    type of:
    ribbon, thread
    any long object resembling a thin line
  7. noun
    a broad flat body part (as of the shoulder or tongue)
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    vane, web
    the flattened weblike part of a feather consisting of a series of barbs on either side of the shaft
    type of:
    anatomical structure, bodily structure, body structure, complex body part, structure
    a particular complex anatomical part of a living thing
  8. noun
    a cut of beef from the shoulder blade
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    type of:
    cut of beef
    cut of meat from beef cattle
  9. noun
    a dashing young man
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    type of:
    spring chicken, young person, younker, youth
    a young person (especially a young man or boy)
Word Family

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