The Collaborative International Dictionary of English v.0.48:

Ticket \Tick"et\, n. [F. ['e]tiquette a label, ticket, fr. OF.
   estiquette, or OF. etiquet, estiquet; both of Teutonic
   origin, and akin to E. stick. See Stick, n. & v., and cf.
   Etiquette, Tick credit.]
   A small piece of paper, cardboard, or the like, serving as a
   notice, certificate, or distinguishing token of something.
   Specifically:
   [1913 Webster]
   (a) A little note or notice. [Obs. or Local]
       [1913 Webster]

             He constantly read his lectures twice a week for
             above forty years, giving notice of the time to his
             auditors in a ticket on the school doors. --Fuller.
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   (b) A tradesman's bill or account. [Obs.]
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   Note: Hence the phrase on ticket, on account; whence, by
         abbreviation, came the phrase on tick. See 1st Tick.
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               Your courtier is mad to take up silks and velvets
               On ticket for his mistress.        --J. Cotgrave.
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   (c) A certificate or token of right of admission to a place
       of assembly, or of passage in a public conveyance; as, a
       theater ticket; a railroad or steamboat ticket.
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   (d) A label to show the character or price of goods.
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   (e) A certificate or token of a share in a lottery or other
       scheme for distributing money, goods, or the like.
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   (f) (Politics) A printed list of candidates to be voted for
       at an election; a set of nominations by one party for
       election; a ballot. [U. S.]
       [1913 Webster]

             The old ticket forever! We have it by thirty-four
             votes.                               --Sarah
                                                  Franklin
                                                  (1766).
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   Scratched ticket, a ticket from which the names of one or
      more of the candidates are scratched out.

   Split ticket, a ticket representing different divisions of
      a party, or containing candidates selected from two or
      more parties.

   Straight ticket, a ticket containing the regular
      nominations of a party, without change.

   Ticket day (Com.), the day before the settling or pay day
      on the stock exchange, when the names of the actual
      purchasers are rendered in by one stockbroker to another.
      [Eng.] --Simmonds.

   Ticket of leave, a license or permit given to a convict, or
      prisoner of the crown, to go at large, and to labor for
      himself before the expiration of his sentence, subject to
      certain specific conditions. [Eng.] --Simmonds.

   Ticket porter, a licensed porter wearing a badge by which
      he may be identified. [Eng.]
      [1913 Webster]

The Collaborative International Dictionary of English v.0.48:

Ticket \Tick"et\, v. t. [imp. & p. p. Ticketed; p. pr. & vb.
   n. Ticketing.]
   1. To distinguish by a ticket; to put a ticket on; as, to
      ticket goods.
      [1913 Webster]

   2. To furnish with a tickets; to book; as, to ticket
      passengers to California. [U. S.]
      [1913 Webster]
      [1913 Webster]

WordNet (r) 3.0 (2006):

ticket
    n 1: a commercial document showing that the holder is entitled
         to something (as to ride on public transportation or to
         enter a public entertainment)
    2: a label written or printed on paper, cardboard, or plastic
       that is attached to something to indicate its owner, nature,
       price, etc. [syn: tag, ticket]
    3: a summons issued to an offender (especially to someone who
       violates a traffic regulation)
    4: a list of candidates nominated by a political party to run
       for election to public offices [syn: slate, ticket]
    5: the appropriate or desirable thing; "this car could be just
       the ticket for a small family" [syn: ticket, just the
       ticket]
    v 1: issue a ticket or a fine to as a penalty; "I was fined for
         parking on the wrong side of the street"; "Move your car or
         else you will be ticketed!" [syn: ticket, fine]
    2: provide with a ticket for passage or admission; "Ticketed
       passengers can board now"

Moby Thesaurus II by Grady Ward, 1.0:

138 Moby Thesaurus words for "ticket":
   Australian ballot, Indiana ballot, Massachusetts ballot, OK,
   absentee ballot, admission, affidavit, allowance, attestation,
   authority, authorization, baggage check, ballot, bill of health,
   billhead, blanket ballot, book stamp, bookplate, brand,
   broad arrow, cachet, card, cashiering, certificate,
   certificate of proficiency, certification, charter, check, choice,
   colophon, conge, consent, counter, counterfoil, countermark,
   coupon, credential, deposal, deposition, diploma, discharge,
   disemployment, dismissal, dispensation, displacing, docket,
   drumming out, earmark, firing, forced separation, furloughing,
   government mark, government stamp, hallmark, hat check, imprint,
   key, label, layoff, leave, letterhead, liberty, license, lineup,
   list, logo, logotype, long ballot, masthead, navicert,
   nonpartisan ballot, notarized statement, note, office-block ballot,
   okay, open sesame, party emblem, party-column ballot, pass,
   password, patent, permission, permission to enter, pink slip,
   plate, price tag, proxy, registered trademark, release, removal,
   retirement, running head, running title, sample ballot, scrip,
   seal, sheepskin, short ballot, sigil, signet, slate, slip, slug,
   special permission, split ticket, stamp, sticker, straight ticket,
   stub, surplusing, suspension, sworn statement, tab, tag, tally,
   testamur, testimonial, the ax, the boot, the bounce, the gate,
   the sack, ticket of admission, title page, token, trade name,
   trademark, trademark name, visa, vise, vote, voucher,
   vouchsafement, waiver, walking papers, warrant, warranty,
   witness