Blouse

a usually lightweight, loose-fitting garment for women and children, covering the body from the neck or shoulders more or less to the waistline, with or without a collar and sleeves, worn inside or outside a skirt, slacks, etc.
a single-breasted, semifitted military jacket.
a loose outer garment, reaching to the hip or thigh, or below the knee, and sometimes belted.
Compare smock frock.
to puff out in a drooping fullness, as a blouse above a fitted waistband.
to dispose the material of a garment in loose folds, as trouser legs over the tops of boots.
Contemporary Examples

Steven Seagal Under Siege John Connolly April 17, 2010
How Straight World Stole ‘Gay’: The Last Gasp of the ‘Lumbersexual’ Tim Teeman November 11, 2014
British Aristocrat and Friend Strip Topless In Airport Security Protest, Captured on CCTV Tom Sykes November 3, 2013
Vacation Primary: Why Republican Candidates Win the Summer Michelle Cottle July 2, 2012
Shining a Spotlight on Mexico’s Iconic Textile—the Rebozo Liza Foreman June 15, 2014

Historical Examples

The Enemies of Women Vicente Blasco Ibez
The Leopard Woman Stewart Edward White
The Girl Scouts at Sea Crest Lillian Garis
Slaves of Mercury Nat Schachner
The Darling and Other Stories Anton Chekhov

noun
a woman’s shirtlike garment made of cotton, nylon, etc
a loose-fitting smocklike garment, often knee length and belted, worn esp by E European peasants
a loose-fitting waist-length belted jacket worn by soldiers
verb
to hang or make so as to hang in full loose folds
n.

In Paris, a very slovenly, loose, drawn frock, with most capacious sleeves, had been introduced called a blouse. Some of our priestesses of the toilet seemed emulous of copying this deshabille, with some slight alterations, but we never wish to see it on the symmetrical form of a British lady. [“Summary of Fashion for 1822,” in “Museum of Foreign Literature and Science,” Jan.-June 1823]