Noun portsmouth has 3 senses
- Portsmouth - a port city in southeastern Virginia on the Elizabeth River opposite Norfolk; naval base; shipyards
--1 is a kind of city, metropolis, urban center; port
--1 is a part of Virginia, Old Dominion, Old Dominion State, VA
- Portsmouth - a port town in southeastern New Hampshire on the Atlantic Ocean
--2 is a kind of town; port
--2 is a part of New Hampshire, Granite State, NH
- Portsmouth, Pompey - a port city in southern England on the English Channel; Britain's major naval base
--3 is a kind of port; city, metropolis, urban center
--3 is a part of England
,