The Collaborative International Dictionary of English v.0.48:

Wedding \Wed"ding\, n. [AS. wedding.]
   Nuptial ceremony; nuptial festivities; marriage; nuptials.
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         Simple and brief was the wedding, as that of Ruth and
         of Boaz.                                 --Longfellow.
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   Note: Certain anniversaries of an unbroken marriage have
         received fanciful, and more or less appropriate, names.
         Thus, the fifth anniversary is called the wooden
         wedding; the tenth, the tin wedding; the fifteenth, the
         crystal wedding; the twentieth, the china wedding; the
         twenty-fifth, the silver wedding; the fiftieth, the
         golden wedding; the sixtieth, the diamond wedding.
         These anniversaries are often celebrated by appropriate
         presents of wood, tin, china, silver, gold, etc., given
         by friends.
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   Note: Wedding is often used adjectively; as, wedding cake,
         wedding cards, wedding clothes, wedding day, wedding
         feast, wedding guest, wedding ring, etc.
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               Let her beauty be her wedding dower. --Shak.
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   Wedding favor, a marriage favor. See under Marriage.
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The Collaborative International Dictionary of English v.0.48:

Wed \Wed\, v. t. [imp. Wedded; p. p. Wedded or Wed; p. pr.
   & vb. n. Wedding.] [OE. wedden, AS. weddian to covenant,
   promise, to wed, marry; akin to OFries. weddia to promise, D.
   wedden to wager, to bet, G. wetten, Icel. ve[eth]ja, Dan.
   vedde, Sw. v[aum]dja to appeal, Goth. gawadj[=o]n to betroth.
   See Wed, n.]
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   1. To take for husband or for wife by a formal ceremony; to
      marry; to espouse.
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            With this ring I thee wed.            --Bk. of Com.
                                                  Prayer.
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            I saw thee first, and wedded thee.    --Milton.
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   2. To join in marriage; to give in wedlock.
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            And Adam, wedded to another Eve,
            Shall live with her.                  --Milton.
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   3. Fig.: To unite as if by the affections or the bond of
      marriage; to attach firmly or indissolubly.
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            Thou art wedded to calamity.          --Shak.
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            Men are wedded to their lusts.        --Tillotson.
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            [Flowers] are wedded thus, like beauty to old age.
                                                  --Cowper.
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   4. To take to one's self and support; to espouse. [Obs.]
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            They positively and concernedly wedded his cause.
                                                  --Clarendon.
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WordNet (r) 3.0 (2006):

wedding
    n 1: the social event at which the ceremony of marriage is
         performed [syn: wedding, wedding ceremony, nuptials,
         hymeneals]
    2: the act of marrying; the nuptial ceremony; "their marriage
       was conducted in the chapel" [syn: marriage, wedding,
       marriage ceremony]
    3: a party of people at a wedding [syn: wedding, wedding
       party]

Moby Thesaurus II by Grady Ward, 1.0:

87 Moby Thesaurus words for "wedding":
   Anschluss, Gretna Green wedding, addition, affiliation,
   agglomeration, aggregation, agreement, alliance, amalgamation,
   assimilation, association, banns, blend, blending, bridal,
   bridal suite, bridechamber, cabal, cartel, centralization, chuppah,
   church wedding, civil ceremony, civil wedding, coalescence,
   coalition, combination, combine, combo, composition, confederacy,
   confederation, congeries, conglomeration, conjugation, conjunction,
   consolidation, conspiracy, ecumenism, elopement, embodiment,
   encompassment, enosis, epithalamium, espousals, espousement,
   federalization, federation, forced marriage, fusion, honeymoon,
   hookup, hymen, hymeneal, hymeneal rites, inclusion, incorporation,
   integration, junction, junta, league, marriage, meld, melding,
   merger, nuptial apartment, nuptial mass, nuptial song, nuptials,
   package, package deal, prothalamium, saffron veil, shotgun wedding,
   solidification, spousal, spousals, syncretism, syndication,
   syneresis, synthesis, tie-up, unification, union, wedding canopy,
   wedding song, wedding veil



The Devil's Dictionary (1881-1906):

WEDDING, n.  A ceremony at which two persons undertake to become one,
one undertakes to become nothing, and nothing undertakes to become
supportable.