Definitions of Orion:

• noun:   a constellation on the equator east of Taurus; contains Betelgeuse and Rigel
• noun:   (Greek mythology) a giant Boeotian hunter who pursued the Pleiades and was eventually slain by Artemis; was then placed in the sky as a constellation
• name:  A surname (very rare: popularity rank in the U.S.: #80263)