Blouse (blouz; F. bl&oomac;z), n. [F. blouse. Of unknown origin.] A light, loose over-garment, like a smock frock, worn especially by workingmen in France; also, a loose coat of any material, as the undress uniform coat of the United States army.

• an outer garment, usually loose, that is similar to a shirt and reaches from the neck to the waist or below. Nowadays, in colloquial use, blouse refers almost always to a woman's garment.
  
  French