1. officially designated as a historic or culturally significant building or site worthy of preservation

1. past tense and past participle of 'landmark': to officially designate a building or site as a historic landmark

Examples

• The landmarked brownstone on Fifth Avenue cannot be demolished without special permission.
• The city council landmarked the old train station to preserve its architectural heritage.
• Many landmarked buildings in the historic district attract tourists from around the world.
• They landmarked the theater after recognizing its importance to the community's cultural history.
• The landmarked mansion is now open to the public as a museum.
• The neighborhood fought to have their church landmarked before the developer could tear it down.