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[bleyd] /bleɪd/
the flat cutting part of a sword, knife, etc.
a sword, rapier, or the like.
a similar part, as of a mechanism, used for clearing, wiping, scraping, etc.:
the blade of a windshield wiper; the blade of a bulldozer.
the arm of a propeller or other similar rotary mechanism, as an electric fan or turbine.
  1. the leaf of a plant, especially of a grass or cereal.
  2. the broad part of a leaf, as distinguished from the stalk or petiole.
the metal part of an ice skate that comes into contact with the ice.
a thin, flat part of something, as of an oar or a bone:
shoulder blade.
Archaic. a dashing, swaggering, or jaunty young man:
a gay blade from the nearby city.
a swordsman.
  1. the foremost and most readily flexible portion of the tongue, including the tip and implying the upper and lower surfaces and edges.
  2. the upper surface of the tongue directly behind the tip, lying beneath the alveolar ridge when the tongue is in a resting position.
the elongated hind part of a fowl's single comb.
Origin of blade
before 1000; Middle English; Old English blæd blade of grass; cognate with Dutch blad, Old Norse blath, German Blatt; akin to blow3
Related forms
bladeless, adjective
multiblade, noun
unblade, verb (used with object), unbladed, unblading. Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2018.
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British Dictionary definitions for blade


the part of a sharp weapon, tool, etc, that forms the cutting edge
(pl) (Austral & NZ) hand shears used for shearing sheep
the thin flattish part of various tools, implements, etc, as of a propeller, turbine, etc
the flattened expanded part of a leaf, sepal, or petal
the long narrow leaf of a grass or related plant
the striking surface of a bat, club, stick, or oar
the metal runner on an ice skate
(archaeol) a long thin flake of flint, possibly used as a tool
the upper part of the tongue lying directly behind the tip
(archaic) a dashing or swaggering young man
short for shoulder blade
a poetic word for a sword, swordsman
Derived Forms
bladed, adjective
Word Origin
Old English blæd; related to Old Norse blath leaf, Old High German blat, Latin folium leaf
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition
© William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins
Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012
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Word Origin and History for blade

Old English blæd "a leaf," but also "a leaf-like part" (of spade, oar, etc.), from Proto-Germanic *bladaz (cf. Old Frisian bled "leaf," German blatt, Old Saxon, Danish, Dutch blad, Old Norse blað), from PIE *bhle-to-, suffixed form (past participle) of *bhel- (3) "to thrive, bloom," possibly identical with *bhel- (2) "to blow, swell" (see bole). Extended in Middle English to shoulders (c.1300) and swords (early 14c.). The modern use in reference to grass may be a Middle English revival, by influence of Old French bled "corn, wheat" (11c., perhaps from Germanic). The cognate in German, Blatt, is the general word for "leaf;" Laub is used collectively as "foliage." Old Norse blað was used of herbs and plants, lauf in reference to trees. This might have been the original distinction in Old English, too. Of men from 1590s; in later use often a reference to 18c. gallants, but the original exact sense, and thus signification, is uncertain.

Online Etymology Dictionary, © 2010 Douglas Harper
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blade in Science
    1. The expanded part of a leaf or petal. Also called lamina. See more at leaf.

    2. The leaf of grasses and similar plants.

  1. A stone tool consisting of a slender, sharp-edged, unserrated flake that is at least twice as long as it is wide. Blade tools were developed late in the stone tool tradition, after core and flake tools, and were probably used especially as knives.

The American Heritage® Science Dictionary
Copyright © 2002. Published by Houghton Mifflin. All rights reserved.
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Slang definitions & phrases for blade



  1. A knife considered as a weapon; Switchblade •This sense dates back to the early 1300s (1940s+ esp underworld)
  2. A surgeon (1970s+ Hospital)
  3. A dashing young man
  4. A homosexual male


To skate on in-line skates: Concerned that Mrs Onassis' son was blading on the day before her funeral (1980+)

[verb sense a shortening of Rollerblade2]

The Dictionary of American Slang, Fourth Edition by Barbara Ann Kipfer, PhD. and Robert L. Chapman, Ph.D.
Copyright (C) 2007 by HarperCollins Publishers.
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