When a person's dead body is entombed, it is buried in a grave or put into a tomb. Neither of them had any idea how long the body had been entombed. to bury or trap someone in something or under the ground
If something is entombed, it is buried or permanently trapped by something. The city was entombed in volcanic lava The Tel, an artificial mountain, entombs Jericho's ancient past
place in a grave or tomb; "Stalin was buried behind the Kremlin wall on Red Square"; "The pharaos were entombed in the pyramids"; "My grandfather was laid to rest last Sunday"