[1] : The Collaborative International Dictionary of English v.0.48

strap \strap\, n. oe. strope, as. stropp, l. stroppus,
   struppus, perhaps fr. gr. ? a band or cord, fr. ? to twist,
   to turn cf. strophe. cf. strop a strap, a piece of
   rope.
   1. a long, narrow, pliable strip of leather, cloth, or the
      like; specifically, a strip of thick leather used in
      flogging.
      1913 webster

            a lively cobbler that . . . had scarce passed a day
            without giving her his wife the discipline of the
            strap.                                --addison.
      1913 webster

   2. something made of such a strip, or of a part of one, or a
      combination of two or more for a particular use; as, a
      boot strap, shawl strap, stirrup strap.
      1913 webster

   3. a piece of leather, or strip of wood covered with a
      suitable material, for sharpening a razor; a strop.
      1913 webster

   4. a narrow strip of anything, as of iron or brass.
      specifically: 
      1913 webster
      a carp.  mach. a band, plate, or loop of metal for
          clasping and holding timbers or parts of a machine.
          1913 webster
      b naut. a piece of rope or metal passing around a
          block and used for fastening it to anything.
          1913 webster

   5. bot.
      a the flat part of the corolla in ligulate florets, as
          those of the white circle in the daisy.
      b the leaf, exclusive of its sheath, in some grasses.
          1913 webster

   6. a shoulder strap. see under shoulder.
      1913 webster

   strap bolt, a bolt of which one end is a flat bar of
      considerable length.

   strap head mach., a journal box, or pair of brasses,
      secured to the end of a connecting rod by a strap. see
      illust. of gib and key, under gib.

   strap hinge, a hinge with long flaps by which it is
      fastened, as to a door or wall.

   strap rail railroads, a flat rail formerly used.
      1913 webster
see also:
strophe strop shoulder strap bolt strap head gib and key 
gib strap hinge strap rail 

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