The Collaborative International Dictionary of English v.0.48:

Tramp \Tramp\, v. t. [imp. & p. p. Tramped; p. pr. & vb. n.
   Tramping.] [OE. trampen; akin to LG. trampen, G. trampeln,
   LG. & D. trappen, Dan. trampe, Sw. & Icel. trampa, Goth.
   anatrimpan to press upon; also to D. trap a step, G. treppe
   steps, stairs. Cf. Trap a kind of rock, Trape, Trip, v.
   i., Tread.]
   1. To tread upon forcibly and repeatedly; to trample.
      [1913 Webster]

   2. To travel or wander through; as, to tramp the country.
      [Colloq.]
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   3. To cleanse, as clothes, by treading upon them in water.
      [Scot.] --Jamieson.
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The Collaborative International Dictionary of English v.0.48:

Tramp \Tramp\, v. i.
   To travel; to wander; to stroll.
   [1913 Webster]

The Collaborative International Dictionary of English v.0.48:

Tramp \Tramp\, n.
   1. A foot journey or excursion; as, to go on a tramp; a long
      tramp. --Blackie.
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   2. A foot traveler; a tramper; often used in a bad sense for
      a vagrant or wandering vagabond. --Halliwell.
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   3. The sound of the foot, or of feet, on the earth, as in
      marching. --Sir W. Scott.
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   4. A tool for trimming hedges.
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   5. A plate of iron worn to protect the sole of the foot, or
      the shoe, when digging with a spade.
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WordNet (r) 3.0 (2006):

tramp
    n 1: a disreputable vagrant; "a homeless tramp"; "he tried to
         help the really down-and-out bums" [syn: tramp, hobo,
         bum]
    2: a person who engages freely in promiscuous sex [syn:
       swinger, tramp]
    3: a foot traveler; someone who goes on an extended walk (for
       pleasure) [syn: hiker, tramp, tramper]
    4: a heavy footfall; "the tramp of military boots"
    5: a commercial steamer for hire; one having no regular schedule
       [syn: tramp steamer, tramp]
    6: a long walk usually for exercise or pleasure; "she enjoys a
       hike in her spare time" [syn: hike, hiking, tramp]
    v 1: travel on foot, especially on a walking expedition; "We
         went tramping about the state of Colorado"
    2: walk heavily and firmly, as when weary, or through mud;
       "Mules plodded in a circle around a grindstone" [syn: slog,
       footslog, plod, trudge, pad, tramp]
    3: cross on foot; "We had to tramp the creeks"
    4: move about aimlessly or without any destination, often in
       search of food or employment; "The gypsies roamed the woods";
       "roving vagabonds"; "the wandering Jew"; "The cattle roam
       across the prairie"; "the laborers drift from one town to the
       next"; "They rolled from town to town" [syn: roll,
       wander, swan, stray, tramp, roam, cast, ramble,
       rove, range, drift, vagabond]

Moby Thesaurus II by Grady Ward, 1.0:

203 Moby Thesaurus words for "tramp":
   Arab, Bowery bum, airing, alien, amble, backpack, baggage,
   bat around, beach bum, beachcomber, beggar, beggarly fellow,
   blighter, bo, budmash, bum, bummer, cadger, caitiff, case,
   character, chug on, constitutional, count ties, crackpot, crank,
   defile, derelict, devil, divagate, dogie, down-and-out,
   down-and-outer, drift, drifter, drunkard, eccentric, fanatic, file,
   file off, flit, floater, footfall, footslog, footstep,
   forced march, gad, gad about, gallivant, gamin, gamine, go about,
   go on parade, go the rounds, good-for-naught, good-for-nothing,
   goose-step, guttersnipe, gypsy, hermit, hike, hit the road,
   hit the trail, hobo, homeless waif, human wreck, hussy, idler,
   jade, jaunt, jezebel, jog on, knock about, knock around, kook,
   landloper, lazzarone, loafer, lone wolf, loner, losel, lowlife,
   lumber, march, mauvais sujet, maverick, mean wretch, meander,
   mendicant, mendicant friar, mendicant order, meshuggenah, mooch,
   moocher, mucker, mudlark, mush, natural, no-good, nomadize,
   nonconformist, nut, odd fellow, oddball, oddity, original,
   outsider, panhandler, parade, pariah, pauvre diable, peg,
   peregrinate, pererrate, peripatetic journey, peripateticism, piker,
   pilgarlic, plod, plod along, plug, plug along, poor creature,
   poor devil, promenade, prowl, queer duck, queer fish,
   queer specimen, ragamuffin, ragman, ragpicker, ramble, range,
   rara avis, roam, rounder, rove, rover, rub on, run about, sad case,
   sad sack, saunter, schlep, schnorrer, screwball, scrounger,
   ski bum, skid-row bum, slattern, slog, slut, solitary, stamp, step,
   stiff, stodge, stomp, straggle, stray, street Arab, street arab,
   street urchin, stretch, stroll, strumpet, stump, sundowner,
   surf bum, swagman, swagsman, tatterdemalion, tennis bum, thud,
   traipse, tramper, trample, tread, trek, truant, trudge, turn,
   turnpiker, type, urchin, vag, vagabond, vagabondize, vagrant,
   vaurien, waif, waifs and strays, walk, walk the tracks, walkabout,
   walking tour, wander, wastrel, wayfare, worthless fellow, wretch,
   zealot