fortress

IPA: fˈɔrtrʌs

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.
(chess) A position that, if obtained by the weaker side, will prevent penetration by the opposing side, generally achieving a draw.

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

Examples of "fortress" in Sentences

“Yes, the Forerunners built this place, what they called a fortress world, in order to —”
By far the most remarkable sight in the fortress is the late works performed by that little enterprizing adventurous animal calld Man.
This combined novel and treatise traces the history of an imaginary French fortress from the 4th Century B.C. through the Napoleonic Wars, featuring detailed accounts of seven sieges.
At last Linton, leaving Bowse in charge of what he called the fortress, proceeded with Raby and Mitchell, carrying the remainder of the water to aid those who either could not or would not move.
This fortress is as ancient as the town, said to have been built about the middle of the twelfth century, and is situated on an elevation at the foot of which flows the Moskva, but there is nothing remarkable in the style excepting its antiquity.