Burial is one of the methods used to dispose of the remains of a deceased individual. It involves burying the deceased underneath the surface of a planet, or sealing the deceased inside a tomb. An area of land set aside for the burial of individuals is known as a cemetery.
A variation is space burial, where a decedent is sealed inside a photon torpedo tube, and the tube is then fired into space.
Captain James T. Kirk stipulated in his will that he preferred his body be cremated following his death and not buried in space as was popular among Starfleet officers. Kirk stated he did not find the idea of floating mummified by vacuum for thousands of years very attractive. (TOS novel: The Entropy Effect)
Following his death on Veridian III in 2371, Captain Kirk was buried in a simple grave by Captain Jean-Luc Picard. About one month after his death, Starfleet sent a team to recover the remains of the USS Enterprise-D and the remains of Captain Kirk from the planet. Kirk's body was taken from its grave by a Romulan ship, and he was then revived. (TNG movie: Star Trek Generations; ST novel: The Return)
After her death at the hands of Skrain Dukat the body of Jadzia Dax was returned to the Trill home world, and buried in a cemetery in the capital city. Her marker had her original name, Jadzia Idaris. (DS9 novel: Trill: Unjoined)
In 2410, T'nae from an alternate timeline buried her former crewmate Natasha Yar and placed a tombstone on her grave on planet Pictae, engraved with Yar's name and the Starfleet emblem. (STO - Yesterday's War mission: "Survivor")