Wiktionary
n. A sport competed between two teams each with two or more players.
WordNet
n. a sport that involves competition between teams of players; "baseball is a team sport by golf is not"
Wikipedia
A team sport includes any sport which involves two or more players working together towards a shared objective. A team sport is an activity in which individuals are organized into opposing teams which compete to win. Examples are basketball, volleyball, water polo, handball, lacrosse, cricket, baseball, and the various forms of football and hockey.
Usage examples of "team sport".
Cycling is far more of a team sport than spectators realize, and it’.
It was probably not a suicide, since that form of death was generally not a team sport.
Sams proves in his Winston Niles Rumfoord, Benjamin Franklin, and Leonardo da Vinci that German batball was the only team sport with which Rumfoord was at all familiar as a child.
Golf was hardly a team sport, and the thought of trying to tee off with one of those bat things appalled her.
Baseball is a team sport, but there is only one player with a ball at the center of each diamond and only one player with a bat at the diamond's lowest point.
One could call it a team sport, except that few of the players were allowed to be aware that they were on a team at all.