[1] : The Collaborative International Dictionary of English v.0.48

dinner \din"ner\, n. f. d^iner, fr. d^iner to dine. see
   dine.
   1. the principal meal of the day, eaten in some countries
      about midday, but in others especially in the u. s. and
      in large cities at a later hour.
      1913 webster

   2. an entertainment; a feast.
      1913 webster

            a grand political dinner.             --tennyson.
      1913 webster

   note: dinner is much used, in an obvious sense, either
         adjectively or as the first part of a compound; as,
         dinner time, or dinner-time, dinner bell, dinner hour,
         etc.
         1913 webster
see also:
dine 

[2] : WordNet (r) 2.0

dinner
     n 1: the main meal of the day served in the evening or at midday;
          "dinner will be at 8"; "on sundays they had a large
          dinner when they returned from church"
     2: a party of people assembled to have dinner together; "guests
        should never be late to a dinner party" syn: dinner
        party
see also:
dinner party 

[3] : Moby Thesaurus II by Grady Ward, 1.0

63 moby thesaurus words for "dinner":
   kaffeeklatsch, tv dinner, alfresco meal, ball, banquet, barbecue,
   blowout, breakfast, brunch, buffet supper, clambake,
   cocktail party, coffee break, coffee klatch, collation, cookout,
   costume party, diner, dinner party, donation party, elevenses,
   entertainment, feast, festival, festivity, fete, fish fry,
   garden party, hen party, high tea, hot luncheon, house party,
   house-raising, housewarming, junket, lawn party, lunch, luncheon,
   mash, mask, masque, masquerade, masquerade party, meat breakfast,
   party, petit dejeuner, picnic, regale, shindig, shindy, shower,
   smoker, spread, stag, stag party, supper, surprise party, tea,
   tea break, teatime, tiffin, wiener roast, wienie roast

Dinner >> D Words
Dinner, definition of term: Dinner
dinner_pag1.html

Dinner Party >> D Words
Dinner Party, definition of term: Dinner Party
dinner+party_pag1.html

Dinner Dress >> D Words
Dinner Dress, definition of term: Dinner Dress
dinner+dress_pag1.html

Dinner Jacket >> D Words
Dinner Jacket, definition of term: Dinner Jacket
dinner+jacket_pag1.html