A knife is a sharp tool that's used for slicing or cutting. We suggest using a knife as a kitchen tool instead of as a weapon.

A bread knife has a long, serrated edge, and the blade of a pocket knife folds into its handle so you can safely carry it in your pocket. Surgeons use very small knives to make delicate cuts during operations, and various kinds of knives are sometimes used as weapons. To knife, in fact, is to stab or cut with a knife, almost always in a violent way.

Definitions of knife
  1. noun
    edge tool used as a cutting instrument; has a pointed blade with a sharp edge and a handle
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    a knife resembling a cleaver; used in the Philippines
    bolo, bolo knife
    long heavy knife with a single edge; of Philippine origin
    Bowie knife
    a stout hunting knife with a single edge
    bread knife
    a knife used to cut bread
    butcher knife
    a large sharp knife for cutting or trimming meat
    carving knife
    a large knife used to carve cooked meat
    case knife, sheath knife
    a knife with a fixed blade that is carried in a sheath
    chopper, cleaver, meat cleaver
    a butcher's knife having a large square blade
    drawknife, drawshave
    a woodworker's knife to shave surfaces
    hunting knife
    a large sharp knife with a handle shaped to fit the grip
    letter opener, paper knife, paperknife
    dull knife used to cut open the envelopes in which letters are mailed or to slit uncut pages of books
    linoleum cutter, linoleum knife
    a knife having a short stiff blade with a curved point used for cutting linoleum
    a stout straight knife used in Malaysia and Indonesia
    parer, paring knife
    a small sharp knife used in paring fruits or vegetables
    pocket knife, pocketknife
    a knife with a blade that folds into the handle; suitable for carrying in the pocket
    pruning knife
    a knife with a curved or hooked blade
    knife especially designed for slicing particular foods, as cheese
    surgical knife
    a very sharp knife used in surgery
    table knife
    a knife used for eating at dining table
    butter knife
    a small knife with a dull blade; for cutting or spreading butter
    case knife
    a metal blade with a handle; used as cutlery
    a long double-edged knife used for amputations
    clasp knife, jackknife
    a large knife with one or more folding blades
    fish knife
    a small table knife with a spatula blade used for eating fish
    lance, lancet
    a surgical knife with a pointed double-edged blade; used for punctures and small incisions
    a small pocketknife; originally used to cut quill pens
    a thin straight surgical knife used in dissection and surgery
    steak knife
    a sharp table knife used in eating steak
    flick knife, flick-knife, switchblade, switchblade knife
    a pocketknife with a blade that springs open at the press of a button
    type of:
    edge tool
    any cutting tool with a sharp cutting edge (as a chisel or knife or plane or gouge)
  2. noun
    a weapon with a handle and blade with a sharp point
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    a knife that can be fixed to the end of a rifle and used as a weapon
    dagger, sticker
    a short knife with a pointed blade used for piercing or stabbing
    a curved steel knife with a razor-sharp edge used in combat by the Gurkhas; has cultural and religious significance in Nepal
    machete, matchet, panga
    a large heavy knife used in Central and South America as a weapon or for cutting vegetation
    a knife used as a weapon
    trench knife
    a knife with a double-edged blade for hand-to-hand fighting
    a long Turkish knife with a curved blade having a single edge
    a relatively long dagger with a straight blade
    a ceremonial four-inch curved dagger that Sikh men and women are obliged to wear at all times
    crease, creese, kris
    a Malayan dagger with a wavy blade
    bodkin, poniard
    a dagger with a slender blade
    a small dagger with a tapered blade
    type of:
    arm, weapon, weapon system
    any instrument or instrumentality used in fighting or hunting
  3. noun
    any long thin projection that is transient
    “rifles exploded quick knives of fire into the dark”
    synonyms: tongue
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    type of:
    any solid convex shape that juts out from something
  4. verb
    use a knife on
    synonyms: stab
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    stab with a poniard
    stab or kill someone with a bayonet
    type of:
    injure, wound
    cause injuries or bodily harm to
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