Definition of wabash:
(n) :
A river in Ohio, Indiana and Illinois, which is a tributary of the Ohio River; in full, the Wabash River.
(n) :
A city, the county seat of Wabash County, Indiana.
(n) :
A number of places in the United States:
(n) :
(rail transport, historical) The former Wabash Railroad.
(n) :
An unincorporated community in Phillips County, Arkansas.
(n) :
An unincorporated community in Cass County, Nebraska.