A blouse most commonly refers to a woman's shirt, although the term used to be once used for men's military uniform shirts. Blouses are often made of cotton or silk cloth and may or may not include a collar and sleeves. They are generally elegantly tailored than simple knit tops with details such as ruffles or embroidered decorations.
the word blouse is often utilized when referring to a women's shirt. An old definition that I found is as follows: a long loose over garment that resembles a shirt or smock and is worn especially by workmen, artists, and peasants; the jacket of a uniform; a usually loose-fitting garment that covers the body from the neck to the waist and is worn especially by women