From Longman Dictionary of Contemporary EnglishCadillacCad‧il‧lac /ˈkædɪlæk, -dəl-/ noun [countable] trademark 1 TTCa very expensive and comfortable car2 GOOD/EXCELLENT American English informal something that is regarded as an example of the highest quality of a particular type of productCadillac of the Cadillac of stereo systems
Examples from the Corpus
Cadillac• First thing you know he wanted a Cadillac.• A large black Cadillac stops in the road to let me cross before pulling in.• Joe Strummer promised the town of Corby, Northamptonshire, a pink Cadillac.• Behind, the Cadillac is idling nervously.• Three others in the Cadillac were airlifted or taken by ambulance to hospitals; the extent of their injuries was not available.• The Cadillac was now parked in a lay-by.• Joey Fish-in-a-Barrel has twenty thousand dollars and three Cadillacs since the contract.Cadillac of• the Cadillac of electric ovens 