a port city in southeastern Virginia on the Elizabeth River opposite Norfolk; naval base; shipyards
"The historic Portsmouth district served as a crucial naval base and shipyard before being merged into the larger city of Newport News."
a port town in southeastern New Hampshire on the Atlantic Ocean
"Visitors often flock to Portsmouth, the historic port town in southeastern New Hampshire, to explore its waterfront along the Atlantic Ocean."
a port city in southern England on the English Channel; Britain's major naval base
"The historic city of Portsmouth, situated on the south coast of England, serves as the nation's primary naval headquarters."
A city and unitary authority in Hampshire, in southern England
"Visitors often arrive in Portsmouth to explore its historic naval base located on the coast of southern England."
The name Portsmouth comes directly from Old English Portesmuða, which described a harbor or port settlement. It traveled into Middle English and eventually modern English with its meaning largely unchanged.