Wordnet 3.0
NOUN (1)
1. 
 a vaguely specified social event; 
- Example: "the party was quite an affair"- Example: "an occasion arranged to honor the president"- Example: "a seemingly endless round of social functions"[syn: affair, occasion, social occasion, function, social function]
WordNet (r) 3.0 (2006):
social occasion
    n 1: a vaguely specified social event; "the party was quite an
         affair"; "an occasion arranged to honor the president"; "a
         seemingly endless round of social functions" [syn:
         affair, occasion, social occasion, function,
         social function]