plural of fortress / plural of fortresse

A fortified place; a large and permanent fortification, sometimes including a town; for example a fort, a castle; a stronghold; a place of defense or security.

(transitive) To furnish with a fortress or with fortresses; to guard, to fortify.

simple past tense and past participle of fortress

present participle of fortress

Obsolete spelling of fortress

(historical) The areas of continental Europe occupied by Nazi Germany during the Second World War, as opposed to the United Kingdom across the Channel.

(informal) The US WWII heavy bomber Boeing B-17.