Definition of "Apollo"

Apollo¹

/əˈpɒləʊ/

proper noun
1. (Greek mythology, Roman mythology) The son of Zeus and Leto (or Jupiter and Latona), and the twin brother of Artemis (or Diana). He was the god of light, music, medicine, and poetry; and prophecy, dance, manly beauty, and more.
  Quotations
  'Blue are the hills that are far away,' is an owercome in the countryside, and while at first on his side it may have been but a young man's fancy, to her he was like the god Apollo descending from the skies.
  1902, John Buchan, The Outgoing of the Tide
2. (astronomy) The planet Mercury, when observed as a Morning Star.
3. (astronomy) Short for 1862 Apollo, an Apollo asteroid.
4. (NASA, space science) A United States space program, and the vehicles it created, used for human travel to the moon.
5. (with "the") Apollo Theater, a music hall in New York City associated with African-American performers.
6. A butterfly of species Parnassius apollo, a large swallowtail with black and red spots on white wings.
7. A very handsome young man.
8. A male given name
9. A placename.

Apollo²

/əˈpɒləʊ/

noun
plural Apollos
1. (astronomy) An asteroid possessing an orbit that crosses the orbit of the Earth and an orbital period of over one year, with semimajor axes greater than 1 AU, and perihelion distances less than 1.017 AU.