From Longman Dictionary of Contemporary Englishcheerleadingcheer‧lead‧ing /ˈtʃɪəˌliːdɪŋ $ ˈtʃɪr-/ noun [uncountable] 1 DSthe activity of being a cheerleader a cheerleading camp for girls2 American EnglishSUPPORT A TEAM OR PLAYER the act of loudly supporting an organization, idea etc and not being willing to listen to criticism of it The conventions have become nothing but cheerleading rallies for the presidential campaign.