The Collaborative International Dictionary of English v.0.48:

Toot \Toot\, v. t.
   To see; to spy. [Obs.] --P. Plowman.
   [1913 Webster]

The Collaborative International Dictionary of English v.0.48:

Toot \Toot\, v. i. [imp. & p. p. Tooted; p. pr. & vb. n.
   Tooting.] [Cf. D. toeten to blow a horn, G. tuten, Sw.
   tuta, Dan. tude; probably of imitative origin.]
   To blow or sound a horn; to make similar noise by contact of
   the tongue with the root of the upper teeth at the beginning
   and end of the sound; also, to give forth such a sound, as a
   horn when blown. "A tooting horn." --Howell.
   [1913 Webster]

         Tooting horns and rattling teams of mail coaches.
                                                  --Thackeray.
   [1913 Webster]

The Collaborative International Dictionary of English v.0.48:

Toot \Toot\, v. t.
   To cause to sound, as a horn, the note being modified at the
   beginning and end as if by pronouncing the letter t; to blow;
   to sound.
   [1913 Webster]

The Collaborative International Dictionary of English v.0.48:

Toot \Toot\, v. i. [OE. toten, AS. totian to project; hence, to
   peep out.] [Written also tout.]
   1. To stand out, or be prominent. [Obs.] --Howell.
      [1913 Webster]

   2. To peep; to look narrowly. [Obs.] --Latimer.
      [1913 Webster]

            For birds in bushes tooting.          --Spenser.
      [1913 Webster]

WordNet (r) 3.0 (2006):

toot
    n 1: a blast of a horn
    2: revelry in drinking; a merry drinking party [syn: carouse,
       carousal, bender, toot, booze-up]
    v 1: make a loud noise; "The horns of the taxis blared" [syn:
         honk, blare, beep, claxon, toot]

Moby Thesaurus II by Grady Ward, 1.0:

84 Moby Thesaurus words for "toot":
   advertise, announce, annunciate, bacchanal, bacchanalia,
   bacchanalian, bagpipe, bat, bay, beep, bell, bender, binge, blare,
   blast, blat, blow, blow a horn, blow the horn, bout, bray,
   broadcast, bugle, bust, carillon, carousal, carouse, celebration,
   clarion, compotation, debauch, disseminate, doodle, double-tongue,
   drinking bout, drunk, drunken carousal, escapade, fanfare, fife,
   fling, flourish of trumpets, flute, guzzle, honk, jag, lark, lip,
   orgy, peal, pipe, ploy, potation, proclaim, pub-crawl, publish,
   randan, randy, revel, shriek, sound, sound a tattoo, sound taps,
   spree, squeal, symposium, tantara, tantarara, taps, tarantara,
   tattoo, tear, tongue, tootle, triple-tongue, trumpet,
   trumpet blast, trumpet call, tweedle, wassail, whistle, wind,
   wind the horn, wingding