Shirtwaist: A woman's blouse tailored like a man's dress shirt with buttons down the front and a collar. A shirtwaist dress is a dress with a shirtwaist top. This style was ubiquitous in the 1950s and can be seen in many old TV shows and commercials.
She half-fell, pushed herself into his arms. How different from the stiff-backed minister's daughter he'd known. Ariah Littrell in her white ruffled blouses, her Peter Pan collars and crisply ironed shirtwaist dresses and flannel skirts.Quotation from: