cardboard UK /ˈkɑːdbɔːd/US /ˈkɑɹdˌbɔɹd/adjective 2noun 3forms 1 adjective2 •Made of or resembling cardboard.The thing really looked quite cardboard. — 1973 •(figurative) Flat or flavorless.The worst of the thing, however, is that the enormity, such as it is, happens to be of a very cardboard and tinsel character. — 1868 noun3 •A wood-based material resembling heavy paper, used in the manufacture of boxes, cartons and signs. •(figurative) Something flat or insubstantial. •Synonym of African nutmeg (“Pycnanthus angolensis”). formscardboards
