sepulcher se·pulc·her UK/ˈsɛpəlkə/ US/ˈsɛpəlkɚ/ uncommon us noun 1. a chamber that is used as a grave Synonymsburial chambersepulchresepulture Related words Broader terms gravechamber Narrower terms cryptHoly Sepulchermausoleumrepositoryvault WordNet 2.1 (Princeton University). Wiktionary (CC BY-SA). CMU Pronouncing Dictionary. WordNet 2.1 Copyright Princeton University. All rights reserved.