Meaning

• An airy pudding served chilled, particularly chocolate mousse.

• A savory dish, of meat or seafood, containing gelatin.

  "ham mousse"

• A styling cream used for hair.

  "He slicked his hair back with mousse, but the cowlick still stuck up."

• A stable emulsion of water and oil that is created by wave action churning the water where an oil spill occurs.

Meaning

• To apply mousse (styling cream).

  "He moussed his hair in the morning and then washed it out at night."