MUSTARD Meaning of MUSTARD in English mustard BrE AmE ˈmʌst əd AmE \ - ə rd▷ mustard|s z▶ ˈ mustard gas BrE AmE▶ ˈ mustard ˌ plaster BrE AmE Longman Pronunciation English Dictionary. Английский словарь произношений Longman. 2012