Definition of unknown soldier in English English dictionary
a soldier, whose name is not known, and whose body is buried in a national monument, which is usually called the Tomb of the Unknown Soldier. He represents all the soldiers of the same nation who died in a war, especially in World War I or World War II
symbolic tomb and commemorative tombstone in honor of those fallen soldiers whose actual burial place is unknown (in the U.S. state of Virginia at Arlington Cemetery)