shirtwaist \shirtwaist\, Shirt waist \Shirt waist\ [shirt + waist; see {waist[3]}, n.] 1. A woman's blouse resembling a men's shirt in cut and style; -- in England called a {blouse}. [Webster 1913 Suppl. +PJC] 2. a type of woman's dress with a bodice tailored like a shirt; -- also called {shirt dress}, {shirtwaist dress}, and {shirtwaister}. --[RHUD] [PJC]