Definition of mousse noun from the Oxford Advanced American Dictionary

     

    mousse

     noun
    noun
    NAmE//mus//
     
    [countable, uncountable]
     
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  1. 1a cold dessert (= a sweet dish) made with cream and egg whites and flavored with fruit, chocolate, etc.; a similar dish flavored with fish, vegetables, etc. a chocolate/strawberry mousse salmon/mushroom mousse
  2. 2a substance that is sold in aerosols, for example the light white substance that is used on hair to give it a particular style or to improve its condition
See the Oxford Advanced Learner's Dictionary entry: mousse