From Longman Dictionary of Contemporary Englishroundersroun‧ders /ˈraʊndəz $ -ərz/ noun [uncountable] DSOa British ball game, similar to baseball, in which players hit the ball and then run around the edge of an area
Examples from the Corpus
rounders• For Nadia and Lynlea, the remainder of the stay will include more sports, among them netball and rounders.• Kids can try rolling hoops, playing graces, rounders or other 1830s games.• He had often watched the cub scouts playing rounders on the beach.• A group of younger children were playing rounders. 