Pronunciation: (pôrts'muth, pōrts'-),[key] —n. 1. a seaport in S Hampshire, in S England, on the English Channel: chief British naval station. 200,900.
2. a seaport in SE Virginia: navy yard. 104,577.
3. a seaport in SE New Hampshire: naval base; Russian-Japanese peace treaty 1905. 26,254.
4. a city in S Ohio, on the Ohio River. 25,943.
5. a town in SE Rhode Island. 14,257.