unionall noun2 •[usually plural] A one-piece garment that is used as work clothes or as a uniform.Frowning thought held him a moment; then he clawed beneath his unionall. — 1920 •A clear vinyl onesie used to prevent leakage from a corpse from soiling the body's clothes or casket lining.If general edema, tissue decomposition or extensive burns are present, a unionall may be necessary to protect the clothing once the body is dressed. — 2011 formsunionalls
