Definition of monmouth:
(n) :
A town and community with a town council in Monmouthshire, Wales (OS grid ref SO5012).
(n) :
A number of places in the United States:
(n) :
A city, the county seat of Warren County, Illinois.
(n) :
A township in Warren County, Illinois, named after the Battle of Monmouth.
(n) :
A minor city and township in Jackson County, Iowa, named after the Battle of Monmouth.
(n) :
A census-designated place in Fresno County, California.