box coat

from The American Heritage® Dictionary of the English Language, 4th Edition

• n. A coat designed to hang loosely from the shoulders.
• n. A heavy overcoat formerly worn by coachmen.

from the GNU version of the Collaborative International Dictionary of English

• n. a thick overcoat for driving; sometimes with a heavy cape to carry off the rain.

from The Century Dictionary and Cyclopedia

• n. A heavy overcoat worn by coachmen.
• n. Early in the present century, an overcoat with a cape, approximately of the form of the coachman's great-coat: intended originally for travelers on the outside of coaches.

from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.

• n. a short coat that hangs loosely from the shoulders