Oxford Advanced American Dictionary

Definition of sauce noun from the Oxford Advanced Learner's Dictionary

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sauce

noun
sauce pronunciation English sɔːs sauce pronunciation American sɔːs
 
1 [countable, uncountable] a thick liquid that is eaten with food to add flavour to ittomato/cranberry/chilli, etc. saucechicken in a white sauceice cream with a hot fudge sauce see also soy sauce, tartare sauce, white sauce2 [uncountable] (old-fashioned, British English, informal) talk or behaviour that is annoying or lacking in respect
Synonym
cheek
Idioms

what's sauce for the goose is sauce for the gander

(old-fashioned, saying) what one person is allowed to do, another person must be allowed to do in a similar situation