Pronunciation: (dub'ul en'did), [key]
1. having the two ends alike.
a. operating equally well with either end as the bow, as a ferryboat.
b. noting a vessel having a stern curved or pointed so as to resemble or suggest a bow.
3. noting any of various vehicles, as certain streetcars, designed to be operated with either end serving as the front.
Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.