noun.
a device that connects two horses to a wagon or other implement. The tugs of a harness are connected to a singletree, two of which are connected to a doubletree, which, in turn, is connected to the implement.
WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.
noun.
a crossbar on a wagon or carriage to which two whiffletrees are attached in order to harness two horses abreast
Word Usage
"A comfortable option is the DoubleTree Biltmore Hotel (115 Hendersonville Rd.; 828-274-1800; biltmorefarmshotels. com/doubletree; rooms from around $150 a night)."