UNDRESS (2)

undress (2). Undress, n. a loose or negligent dress

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Un″dress (?), n. 1. 1. A loose, negligent dress; ordinary dress, as distinguished from full dress.
2. 2. (Mil. & Naval) An authorized habitual dress of officers and soldiers, but not full-dress uniform.
Undress parade (Mil.), a substitute for dress parade, allowed in bad weather, the companies forming without arms, and the ceremony being shortened.