The Collaborative International Dictionary of English v.0.48:

Blade \Blade\ (bl[=a]d), v. t.
   To furnish with a blade.
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The Collaborative International Dictionary of English v.0.48:

Blade \Blade\, v. i.
   To put forth or have a blade.
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         As sweet a plant, as fair a flower, is faded
         As ever in the Muses' garden bladed.     --P. Fletcher.
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The Collaborative International Dictionary of English v.0.48:

Blade \Blade\ (bl[=a]d), n. [OE. blade, blad, AS. bl[ae]d leaf;
   akin to OS., D., Dan., & Sw. blad, Icel. bla[eth], OHG. blat,
   G. blatt, and perh. to L. folium, Gr. fy`llon. The root is
   prob. the same as that of AS. bl[=o]wan, E. blow, to blossom.
   See Blow to blossom, and cf. Foil leaf of metal.]
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   1. Properly, the leaf, or flat part of the leaf, of any
      plant, especially of gramineous plants. The term is
      sometimes applied to the spire of grasses.
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            The crimson dulse . . . with its waving blade.
                                                  --Percival.
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            First the blade, then ear, after that the full corn
            in the ear.                           --Mark iv. 28.
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   2. The cutting part of an instrument; as, the blade of a
      knife or a sword.
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   3. The broad part of an oar; also, one of the projecting arms
      of a screw propeller.
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   4. The scapula or shoulder blade.
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   5. pl. (Arch.) The principal rafters of a roof. --Weale.
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   6. pl. (Com.) The four large shell plates on the sides, and
      the five large ones of the middle, of the carapace of the
      sea turtle, which yield the best tortoise shell. --De
      Colange.
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   7. A sharp-witted, dashing, wild, or reckless, fellow; -- a
      word of somewhat indefinite meaning.
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            He saw a turnkey in a trice
            Fetter a troublesome blade.           --Coleridge.
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   8. The flat part of the tongue immediately behind the tip, or
      point.
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            "Lower blade" implies, of course, the lower instead
            of the upper surface of the tongue.   --H. Sweet.
      [Webster 1913 Suppl.]

WordNet (r) 3.0 (2006):

blade
    n 1: especially a leaf of grass or the broad portion of a leaf
         as distinct from the petiole [syn: blade, leaf blade]
    2: a dashing young man; "gay young blades bragged of their
       amorous adventures"
    3: something long and thin resembling a blade of grass; "a blade
       of lint on his suit"
    4: a cutting or thrusting weapon that has a long metal blade and
       a hilt with a hand guard [syn: sword, blade, brand,
       steel]
    5: a cut of beef from the shoulder blade
    6: a broad flat body part (as of the shoulder or tongue)
    7: the part of the skate that slides on the ice
    8: flat surface that rotates and pushes against air or water
       [syn: blade, vane]
    9: the flat part of a tool or weapon that (usually) has a
       cutting edge