NOUN (2)

1. a light evening meal; served in early evening if dinner is at midday or served late in the evening at bedtime;

2. a social gathering where a light evening meal is served;
- Example: "her suppers often included celebrities"

The Collaborative International Dictionary of English v.0.48:

Supper \Sup"per\, n. [OE. soper, super, OF. super, soper, F.
   souper; originally an infinitive, to sup, take a meal. See
   Soup, and cf. Sup to take supper.]
   A meal taken at the close of the day; the evening meal.
   [1913 Webster]

   Note: Supper is much used in an obvious sense, either
         adjectively or as the first part of a compound; as,
         supper time or supper-time, supper bell, supper hour,
         etc.
         [1913 Webster]

The Collaborative International Dictionary of English v.0.48:

Supper \Sup"per\, v. i.
   To take supper; to sup. [R.]
   [1913 Webster]

The Collaborative International Dictionary of English v.0.48:

Supper \Sup"per\, v. t.
   To supply with supper. [R.] "Kester was suppering the
   horses." --Mrs. Gaskell.
   [1913 Webster]

WordNet (r) 3.0 (2006):

supper
    n 1: a light evening meal; served in early evening if dinner is
         at midday or served late in the evening at bedtime
    2: a social gathering where a light evening meal is served; "her
       suppers often included celebrities"