Olympiad

noun3

1. •
   A competition aspiring to the importance of the Olympic Games or considered similar to them, especially one occurring at 4-year intervals, representing a national or international range of amateur student rather than professional adult competition, and/or requiring the highest level of ability in the field for success.

   • the International Mathematical Olympiad... the Science Olympiad... the International Science Olympiads... the Women's Chess Olympiad...
2. •
   (nonstandard) Synonym of Olympic Games: an instance of the ancient or modern Olympic Games.

   • Victors at the ancient Olympiads only won an olive wreath but were usually freed from paying taxes for the remainder of their life, but modern Olympians have frequently needed to pay taxes on the market value of their gold, silver, or bronze medals.
3. •
   A four-year period, particularly (historical) those based on Hippias's computations of the ancient Olympic Games which placed Coroebus's footrace victory in 776 BCE and (sports) those based on the modern Summer Olympic Games first held in 1896.

   • Ancient sources variously dated the founding of Rome to the 38th year before the first Olympiad, the third or fourth year of the sixth Olympiad, the first year of the seventh or eighth Olympiad, or the fourth year of the 12th Olympiad.