The Collaborative International Dictionary of English v.0.48:

Trussing \Truss"ing\, n.
   1. (Arch. & Engin.) The timbers, etc., which form a truss,
      taken collectively. --Weale.
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   2. (Arch. & Engin.) The art of stiffening or bracing a set of
      timbers, or the like, by putting in struts, ties, etc.,
      till it has something of the character of a truss.
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   3. The act of a hawk, or other bird of prey, in seizing its
      quarry, and soaring with it into air. [Obs.]
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The Collaborative International Dictionary of English v.0.48:

Truss \Truss\, v. t. [imp. & p. p. Trussed; p. pr. & vb. n.
   Trussing.] [F. trousser. See Truss, n.]
   1. To bind or pack close; to tie up tightly; to make into a
      truss. --Shak.
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            It [his hood] was trussed up in his wallet.
                                                  --Chaucer.
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   2. To take fast hold of; to seize and hold firmly; to pounce
      upon. [Obs.]
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            Who trussing me as eagle doth his prey. --Spenser.
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   3. To strengthen or stiffen, as a beam or girder, by means of
      a brace or braces.
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   4. To skewer; to make fast, as the wings of a fowl to the
      body in cooking it.
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   5. To execute by hanging; to hang; -- usually with up.
      [Slang.] --Sir W. Scott.
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   To truss a person or To truss one's self, to adjust and
      fasten the clothing of; especially, to draw tight and tie
      the laces of garments. [Obs.] "Enter Honeysuckle, in his
      nightcap, trussing himself." --J. Webster (1607).

   To truss up, to strain; to make close or tight.

   Trussed beam, a beam which is stiffened by a system of
      braces constituting a truss of which the beam is a chord.
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