The Collaborative International Dictionary of English v.0.48:

Trip \Trip\ (tr[i^]p), v. i. [imp. & p. p. Tripped (tr[i^]pt);
   p. pr. & vb. n. Tripping.] [OE. trippen; akin to D.
   trippen, Dan. trippe, and E. tramp. See Tramp.]
   [1913 Webster]
   1. To move with light, quick steps; to walk or move lightly;
      to skip; to move the feet nimbly; -- sometimes followed by
      it. See It, 5.
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            This horse anon began to trip and dance. --Chaucer.
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            Come, and trip it, as you go,
            On the light fantastic toe.           --Milton.
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            She bounded by, and tripped so light
            They had not time to take a steady sight. --Dryden.
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   2. To make a brief journey or pleasure excursion; as, to trip
      to Europe.
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   3. To take a quick step, as when in danger of losing one's
      balance; hence, to make a false step; to catch the foot;
      to lose footing; to stumble.
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   4. Fig.: To be guilty of a misstep; to commit an offense
      against morality, propriety, or rule; to err; to mistake;
      to fail. "Till his tongue trip." --Locke.
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            A blind will thereupon comes to be led by a blind
            understanding; there is no remedy, but it must trip
            and stumble.                          --South.
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            Virgil is so exact in every word that none can be
            changed but for a worse; he pretends sometimes to
            trip, but it is to make you think him in danger when
            most secure.                          --Dryden.
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            What? dost thou verily trip upon a word? --R.
                                                  Browning.
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The Collaborative International Dictionary of English v.0.48:

Tripping \Trip"ping\, a.
   1. Quick; nimble; stepping lightly and quickly.
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   2. (Her.) Having the right forefoot lifted, the others
      remaining on the ground, as if he were trotting; trippant;
      -- said of an animal, as a hart, buck, and the like, used
      as a bearing.
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The Collaborative International Dictionary of English v.0.48:

Tripping \Trip"ping\, n.
   1. Act of one who, or that which, trips.
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   2. A light dance.
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            Other trippings to be trod of lighter toes.
                                                  --Milton.
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   3. (Naut.) The loosing of an anchor from the ground by means
      of its cable or buoy rope.
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   Tripping line (Naut.), a small rope attached to the
      topgallant or royal yard, used to trip the yard, and in
      lowering it to the deck; also, a line used in letting go
      the anchor. --Luce.
      [1913 Webster]

WordNet (r) 3.0 (2006):

tripping
    adj 1: characterized by a buoyant rhythm; "an easy lilting
           stride"; "the flute broke into a light lilting air"; "a
           swinging pace"; "a graceful swingy walk"; "a tripping
           singing measure" [syn: lilting, swinging, swingy,
           tripping]
    2: moving easily and quickly; nimble; "the dancer was light and
       graceful"; "a lightsome buoyant step"; "walked with a light
       tripping step" [syn: light, lightsome, tripping]

Moby Thesaurus II by Grady Ward, 1.0:

26 Moby Thesaurus words for "tripping":
   balanced, concinnate, concinnous, delirium tremens, dream, easy,
   elegant, euphonic, euphonical, euphonious, facile, flowing, fluent,
   graceful, hallucination, hallucinosis, harmonious, measured,
   mind-expansion, ordered, orderly, pleasing, smooth,
   smooth-sounding, sweet, symmetrical