noun

• A male given name from Latin, borne by numerous saints and 13 popes.
• (astronomy) A constellation of the zodiac, shaped approximately like a lion and containing the stars Regulus and Denebola.
• (astrology) The zodiac sign for the Lion, ruled by the Sun and covering July 23 - August 22 (tropical astrology) or August 16 - September 15 (sidereal astrology).
• A surname.
• An unincorporated community in Jackson Township, Jackson County, Ohio, United States.
• A ghost town in Roane County, West Virginia, United States.
• Someone with a Leo star sign
• A Leonberger
• (informal) Abbreviation of leotard. [A one-piece skintight garment with or without sleeves and without legs (often worn by gymnasts, acrobats, wrestlers, female swimmers, etc.)]
• Acronym of Lyons Electronic Office (an early British computer).
• Acronym of low Earth orbit. [A satellite orbit around the Earth within the altitude range of ~ 200 - 2000 km, in which a satellite can communicate with Earth with a small time lag and energy consumption. Abbreviation: LEO.]
• Acronym of law enforcement officer.