Entry 1 sense Webster, 1913 Restaurateur /(rā̇`stō`rȧ`tẽr")/ · Re·stau·ra·teur · IPA /ˌɹɛst(ə)ɹəˈtɜː/ 01 n. The keeper of an eating house or a restaurant. 1. The keeper of an eating house or a restaurant.