From Longman Dictionary of Contemporary Englishtartare saucetar‧tare sauce /ˌtɑːtə ˈsɔːs $ ˌtɑːrtər ˈsɒːs/ noun [uncountable] DFa cold white sauce often eaten with fish, made from egg, oil, gherkins, and capers
Examples from the Corpus
tartare sauce• Serve with bottled tartare sauce or a squeeze from a plastic lemon. 