Wordnet 3.0
NOUN (2)
1.
badminton played with two players on each side;
2.
tennis played with two players on each side;
The Collaborative International Dictionary of English v.0.48:
doubles \dou"bles\ n.
1. badminton played with two players on each side.
[WordNet 1.5]
2. tennis played with two players on each side.
[WordNet 1.5]
WordNet (r) 3.0 (2006):
doubles
n 1: badminton played with two players on each side
2: tennis played with two players on each side
Moby Thesaurus II by Grady Ward, 1.0:
20 Moby Thesaurus words for "doubles":
bout, contest, decathlon, double-header, event, foursome, game,
games of chance, go, match, meet, pentathlon, play, play-off, race,
runoff, singles, sport, threesome, twosome