The Collaborative International Dictionary of English v.0.48:

Haunch \Haunch\ (h[aum]nch; 277), n. [F. hanche, of German
   origin; cf. OD. hancke, hencke, and also OHG. ancha; prob.
   not akin to E. ankle.]
   1. The hip; the projecting region of the lateral parts of the
      pelvis and the hip joint; the hind part.
      [1913 Webster]

   2. Of meats: The leg and loin taken together; as, a haunch of
      venison.
      [1913 Webster]

   Haunch bone. See Innominate bone, under Innominate.

   Haunches of an arch (Arch.), the parts on each side of the
      crown of an arch. (See Crown, n., 11.) Each haunch may
      be considered as from one half to two thirds of the half
      arch.
      [1913 Webster]

The Collaborative International Dictionary of English v.0.48:

Hip \Hip\, n. [OE. hipe, huppe, AS. hype; akin to D. heup, OHG.
   huf, G. h["u]fte, Dan. hofte, Sw. h["o]ft, Goth. hups; cf.
   Icel. huppr, and also Gr. ? the hollow above the hips of
   cattle, and Lith. kumpis ham.]
   [1913 Webster]
   1. The projecting region of the lateral parts of one side of
      the pelvis and the hip joint; the haunch; the huckle.
      [1913 Webster]

   2. (Arch.) The external angle formed by the meeting of two
      sloping sides or skirts of a roof, which have their wall
      plates running in different directions.
      [1913 Webster]

   3. (Engin) In a bridge truss, the place where an inclined end
      post meets the top chord. --Waddell.
      [1913 Webster]

   Hip bone (Anat.), the innominate bone; -- called also
      haunch bone and huckle bone.

   Hip girdle (Anat.), the pelvic girdle.

   Hip joint (Anat.), the articulation between the thigh bone
      and hip bone.

   Hip knob (Arch.), a finial, ball, or other ornament at the
      intersection of the hip rafters and the ridge.

   Hip molding (Arch.), a molding on the hip of a roof,
      covering the hip joint of the slating or other roofing.

   Hip rafter (Arch.), the rafter extending from the wall
      plate to the ridge in the angle of a hip roof.

   Hip roof, Hipped roof (Arch.), a roof having sloping ends
      and sloping sides. See Hip, n., 2., and Hip, v. t., 3.


   Hip tile, a tile made to cover the hip of a roof.

   To catch upon the hip, or To have on the hip, to have or
      get the advantage of; -- a figure probably derived from
      wresting. --Shak.

   To smite hip and thigh, to overthrow completely; to defeat
      utterly. --Judg. xv. 8.
      [1913 Webster]