The Collaborative International Dictionary of English v.0.48:

Hitch \Hitch\, v. i.
   To hitchhike; -- mostly used in the phrase to hitch a ride;
   as, he hitched his way home; he hitched a ride home.
   [PJC]

The Collaborative International Dictionary of English v.0.48:

Hitch \Hitch\, v. t. [imp. & p. p. Hitched; p. pr. & vb. n.
   Hitching.]
   1. To hook; to catch or fasten as by a hook or a knot; to
      make fast, unite, or yoke; as, to hitch a horse, or a
      halter; hitch your wagon to a star.
      [1913 Webster +PJC]

   2. To move with hitches; as, he hitched his chair nearer.
      [1913 Webster]

   To hitch up.
      (a) To fasten up.
      (b) To pull or raise with a jerk; as, a sailor hitches up
          his trousers.
      (c) To attach, as a horse, to a vehicle; as, hitch up the
          gray mare. [Colloq.]
          [1913 Webster]

The Collaborative International Dictionary of English v.0.48:

Hitch \Hitch\ (h[i^]ch), v. t. [Cf. Scot. hitch a motion by a
   jerk, and hatch, hotch, to move by jerks, also Prov. G.
   hiksen, G. hinken, to limp, hobble; or E. hiccough; or
   possibly akin to E. hook.]
   1. To become entangled or caught; to be linked or yoked; to
      unite; to cling.
      [1913 Webster]

            Atoms . . . which at length hitched together.
                                                  --South.
      [1913 Webster]

   2. To move interruptedly or with halts, jerks, or steps; --
      said of something obstructed or impeded.
      [1913 Webster]

            Slides into verse, and hitches in a rhyme. --Pope.
      [1913 Webster]

            To ease themselves . . . by hitching into another
            place.                                --Fuller.
      [1913 Webster]

   3. To hit the legs together in going, as horses; to
      interfere. [Eng.] --Halliwell.

The Collaborative International Dictionary of English v.0.48:

Hitch \Hitch\, n.
   1. A catch; anything that holds, as a hook; an impediment; an
      obstacle; an entanglement.
      [1913 Webster]

   2. The act of catching, as on a hook, etc.
      [1913 Webster]

   3. A stop or sudden halt; a stoppage; an impediment; a
      temporary obstruction; an obstacle; as, a hitch in one's
      progress or utterance; a hitch in the performance.
      [1913 Webster]

   4. A sudden movement or pull; a pull up; as, the sailor gave
      his trousers a hitch.
      [1913 Webster]

   5. (Naut.) A knot or noose in a rope which can be readily
      undone; -- intended for a temporary fastening; as, a half
      hitch; a clove hitch; a timber hitch, etc.
      [1913 Webster]

   6. (Geol.) A small dislocation of a bed or vein.
      [1913 Webster]

WordNet (r) 3.0 (2006):

hitch
    n 1: a period of time spent in military service [syn:
         enlistment, hitch, term of enlistment, tour of
         duty, duty tour, tour]
    2: the state of inactivity following an interruption; "the
       negotiations were in arrest"; "held them in check"; "during
       the halt he got some lunch"; "the momentary stay enabled him
       to escape the blow"; "he spent the entire stop in his seat"
       [syn: arrest, check, halt, hitch, stay, stop,
       stoppage]
    3: an unforeseen obstacle [syn: hang-up, hitch, rub,
       snag]
    4: a connection between a vehicle and the load that it pulls
    5: a knot that can be undone by pulling against the strain that
       holds it; a temporary knot
    6: any obstruction that impedes or is burdensome [syn:
       hindrance, hinderance, hitch, preventive,
       preventative, encumbrance, incumbrance, interference]
    7: the uneven manner of walking that results from an injured leg
       [syn: hitch, hobble, limp]
    v 1: to hook or entangle; "One foot caught in the stirrup" [syn:
         hitch, catch] [ant: unhitch]
    2: walk impeded by some physical limitation or injury; "The old
       woman hobbles down to the store every day" [syn: limp,
       gimp, hobble, hitch]
    3: jump vertically, with legs stiff and back arched; "the yung
       filly bucked" [syn: buck, jerk, hitch]
    4: travel by getting free rides from motorists [syn:
       hitchhike, hitch, thumb]
    5: connect to a vehicle: "hitch the trailer to the car"