The Collaborative International Dictionary of English v.0.48:

Ramble \Ram"ble\, n.
   1. A going or moving from place to place without any
      determinate business or object; an excursion or stroll
      merely for recreation.
      [1913 Webster]

            Coming home, after a short Christmas ramble.
                                                  --Swift.
      [1913 Webster]

   2. [Cf. Rammel.] (Coal Mining) A bed of shale over the
      seam. --Raymond.
      [1913 Webster]

   3. A section of woods suitable for leisurely walking.
      [PJC]

   4. a type of dance; as, the Muskrat ramble.
      [PJC]

The Collaborative International Dictionary of English v.0.48:

Ramble \Ram"ble\ (r[a^]m"b'l), v. i. [imp. & p. p. Rambled
   (r[a^]m"b'ld); p. pr. & vb. n. Rambling (r[a^]m"bl[i^]ng).]
   [For rammle, fr. Prov. E. rame to roam. Cf. Roam.]
   1. To walk, ride, or sail, from place to place, without any
      determinate object in view; to roam carelessly or
      irregularly; to rove; to wander; as, to ramble about the
      city; to ramble over the world.
      [1913 Webster]

            He that is at liberty to ramble in perfect darkness,
            what is his liberty better than if driven up and
            down as a bubble by the wind?         --Locke.
      [1913 Webster]

   2. To talk or write in a discursive, aimless way.
      [1913 Webster]

   3. To extend or grow at random. --Thomson.
      [1913 Webster]

   Syn: To rove; roam; wander; range; stroll.
        [1913 Webster]

WordNet (r) 3.0 (2006):

ramble
    n 1: an aimless amble on a winding course [syn: ramble,
         meander]
    v 1: continue talking or writing in a desultory manner; "This
         novel rambles on and jogs" [syn: ramble on, ramble,
         jog]
    2: 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:

164 Moby Thesaurus words for "ramble":
   Wanderjahr, afoot and lighthearted, airing, amble, babble,
   bat around, be insane, blab, blabber, blather, blether, bum,
   bumming, chat, chatter, clack, clatter, constitutional, count ties,
   depart, deviate, digress, discursion, dither, divagate, divagation,
   diverge, dote, drift, drifting, drivel, drool, err, errantry,
   excurse, flit, flitting, forced march, gab, gabble, gad, gad about,
   gadding, gallivant, gas, get sidetracked, gibber, gibble-gabble,
   go about, go adrift, go astray, go away, go off, go on,
   go the rounds, gossip, gush, have a demon, haver, hike,
   hit the road, hit the trail, hobo, hoboism, itineracy, itinerancy,
   jabber, jaunt, jaw, knock about, knock around, march, maunder,
   meander, mooch, mosey, mush, natter, nomadism, nomadize, palaver,
   parade, patter, perambulate, peregrinate, peregrination, pererrate,
   pererration, peripatetic journey, peripateticism, pour forth,
   prate, prattle, promenade, prowl, rage, ramble on, rambling, range,
   rant, rattle, rattle on, rave, reel off, roam, roaming, rove,
   roving, run about, run amok, run mad, run on, saunter, schlep,
   scramble, slaver, slobber, snake, spout, spout off, sprangle,
   spread-eagle, straddle, straggle, stray, straying, stretch, stroll,
   talk away, talk nonsense, talk on, tittle-tattle, tour, traipse,
   traipsing, tramp, travel, trek, trudge, turn, turn aside, twaddle,
   twattle, twist, twist and turn, vagabond, vagabondage, vagabondia,
   vagabondism, vagabondize, vagrancy, waffle, walk, walk the tracks,
   walkabout, walking tour, wander, wandering, wanderlust, wayfare,
   wayfaring, wind, yak, yakkety-yak