The Collaborative International Dictionary of English v.0.48:

Transpire \Tran*spire"\, v. i. [imp. & p. p. Transpired; p.
   pr. & vb. n. Transpiring.] [F. transpirer; L. trans across,
   through + spirare to breathe. See Spirit.]
   1. (Physiol.) To pass off in the form of vapor or insensible
      perspiration; to exhale.
      [1913 Webster]

   2. (Bot.) To evaporate from living cells.
      [1913 Webster]

   3. To escape from secrecy; to become public; as, the
      proceedings of the council soon transpired.
      [1913 Webster]

            The story of Paulina's and Maximilian's mutual
            attachment had transpired through many of the
            travelers.                            --De Quincey.
      [1913 Webster]

   4. To happen or come to pass; to occur.
      [1913 Webster]

   Note: This sense of the word, which is of comparatively
         recent introduction, is common in the United States,
         especially in the language of conversation and of
         newspaper writers, and is used to some extent in
         England. Its use, however, is censured by critics of
         both countries.
         [1913 Webster]

The Collaborative International Dictionary of English v.0.48:

Transpire \Tran*spire"\, v. t.
   1. (Physiol.) To excrete through the skin; to give off in the
      form of vapor; to exhale; to perspire.
      [1913 Webster]

   2. (Bot.) To evaporate (moisture) from living cells.
      [1913 Webster]

WordNet (r) 3.0 (2006):

transpire
    v 1: pass through the tissue or substance or its pores or
         interstices, as of gas [syn: transpire, transpirate]
    2: exude water vapor; "plants transpire"
    3: come to light; become known; "It transpired that she had
       worked as spy in East Germany"
    4: come about, happen, or occur; "Several important events
       transpired last week"
    5: give off (water) through the skin

Moby Thesaurus II by Grady Ward, 1.0:

64 Moby Thesaurus words for "transpire":
   appear, arise, be found, be met with, be realized, be revealed,
   become known, befall, betide, bleed, break, break forth, chance,
   come, come about, come down, come off, come out, come to light,
   come to pass, come true, develop, discharge, effuse, emit,
   eventuate, excrete, exfiltrate, extravasate, exudate, exude, fall,
   fall out, filter, filtrate, get out, give off, go, go off, hap,
   happen, leach, leak, leak out, lixiviate, manifest itself,
   materialize, occur, ooze, out, pass, pass off, percolate, reek,
   result, seep, show its colors, show its face, stand revealed,
   strain, take place, transude, turn out, weep