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(Placename) a county of E Wales: administratively part of England for three centuries (until 1830); mainly absorbed into the county of Gwent in 1974; reinstated with reduced boundaries in 1996: chiefly agricultural, with the Black Mountains in the N. Administrative centre: Cwmbran. Pop: 86 200 (2003 est). Area: 851 sq km (329 sq miles)
Collins English Dictionary – Complete and Unabridged, 12th Edition 2014 © HarperCollins Publishers 1991, 1994, 1998, 2000, 2003, 2006, 2007, 2009, 2011, 2014
Mon•mouth•shire(ˈmɒn məθˌʃɪər, -ʃər)
a historic county in E Wales, now part of Gwent, Mid Glamorgan, and South Glamorgan.Also called Monmouth.
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