Cadillac UK /ˈkædɪlæk/US /ˈkædəˌlæk/adjective 1noun 2forms 3phrases 2 adjective1 •(US) Describing a brand representing the most luxurious or highest quality example in its class. (derived from the GM car brand Cadillac) noun2 •An automobile of this marque. Often used as an example of a luxury car or luxuriousness in general.the Cadillac of microwave ovensShe cryin’ poor mouth but she pull up in a brand new Cadillac? Who fallin’ for that? •A mountain in Maine. formsCadillacs · more Cadillac · most Cadillac Phrases with Cadillac Cadillac problemAn insignificant problem of a privileged person. welfare CadillacThe case of a person or group receiving public benefits, although the benefits are not actually needed by the recipient or are obtained by fraud.