Caesar salad Syllabification: (Cae·sar sal·ad)Definition of Caesar salad noun a salad consisting of romaine lettuce and croutons served with a dressing of olive oil, lemon juice, raw egg, Worcestershire sauce, and seasoning. Origin:named after Caesar Cardini, the Mexican restaurateur who invented it in 1924Caesar salad in other Oxford dictionaries Definition of Caesar salad in the British & World English dictionary