A body was the physical form of a living being. When dead, a body was sometimes known as a corpse.
The Relic was the body of the Doctor. It was found after a battle on Dronid, then put up for auction in the Unthinkable City on Earth in the late 21st century. (PROSE: Alien Bodies)
Lady Cassandra used several bodies as hosts, including Rose Tyler, the Tenth Doctor and Chip when she had left her own body, through the use of a psychograft. (TV: New Earth)
House removed the TARDIS matrix and implanted it in Idris' body so it could occupy the TARDIS and escape the bubble universe. (TV: The Doctor's Wife)
Instead of using the term “incarnation“, a Time Lord may use the term “body“ instead.