- the greatest of the games or festivals of ancient Greece, held every four years in the plain of Olympia in Elis, in honor of Zeus.
- a modern international sports competition, held once every four years.
- the greatest Panhellenic festival, held every fourth year in honour of Zeus at ancient Olympia. From 472 bc, it consisted of five days of games, sacrifices, and festivities
- the modern revival of these games, consisting of international athletic and sporting contests held every four years in a selected country since their inception in Athens in 1896
