world-class /wɜː(ɹ)ldˈklæs/ adjective2 •Of a standard that ranks among the best in the world.Chris Green remarks that this "world-class gateway to London and the UK still looks as good as new", [...]. — 2022 •(informal) Extraordinary in degree.Both of you, prepare for a world-class punishment session when we get home! — 2004 formsmore world-class · most world-class