The Collaborative International Dictionary of English v.0.48:

Hoof \Hoof\, v. i.
   1. To walk as cattle. [R.] --William Scott.
      [1913 Webster]

   2. To be on a tramp; to foot. [Slang, U.S.]
      [1913 Webster]

   To hoof it, to foot it.

   On the hoof, of cattle, standing (on the hoof); not
      slaughtered.

   beef on the hoof, live cattle.
      [Webster 1913 Suppl.]

The Collaborative International Dictionary of English v.0.48:

Hoof \Hoof\ (h[=oo]f), n.; pl. Hoofs (h[=oo]fs), very rarely
   Hooves (h[=oo]vz). [OE. hof, AS. h[=o]f; akin to D. hoef,
   G. huf, OHG. huof, Icel. h[=o]fr, Sw. hof, Dan. hov; cf.
   Russ. kopuito, Skr. [,c]apha. [root]225.]
   1. The horny substance or case that covers or terminates the
      feet of certain animals, as horses, oxen, etc.
      [1913 Webster]

            On burnished hooves his war horse trode. --Tennyson.
      [1913 Webster]

   2. A hoofed animal; a beast.
      [1913 Webster]

            Our cattle also shall go with us; there shall not a
            hoof be left behind.                  --Ex. x. 26.
      [1913 Webster]

   3. (Geom.) See Ungula.
      [1913 Webster]

WordNet (r) 3.0 (2006):

hoof
    n 1: the foot of an ungulate mammal
    2: the horny covering of the end of the foot in ungulate mammals
    v 1: walk; "let's hoof it to the disco" [syn: foot, leg it,
         hoof, hoof it]
    2: dance in a professional capacity

Moby Thesaurus II by Grady Ward, 1.0:

60 Moby Thesaurus words for "hoof":
   ambulate, ankle, arch, circumambulate, clog, clubfoot, dance,
   digit, dog, extremity, fetlock, foot, foot it, forefoot, forepaw,
   fox-trot, harefoot, heel, hoof it, hop, instep, jaywalk, jog on,
   leg, leg it, pace, pad, pastern, patte, paw, pedal extremity,
   pedes, pedestrianize, perambulate, peripateticate, pes, pied,
   prance, pug, shake, shimmy, shuffle, shuffle along, skip, sole,
   splayfoot, step, stride, stump it, tap-dance, toe, tootsy, traipse,
   tread, trip, troop, trotter, ungula, walk, waltz



Easton's 1897 Bible Dictionary:

Hoof
   a cleft hoof as of neat cattle (Ex. 10:26; Ezek. 32:13); hence
   also of the horse, though not cloven (Isa. 5:28). The "parting
   of the hoof" is one of the distinctions between clean and
   unclean animals (Lev. 11:3; Deut. 14:7).