A halo is a ring of light that surrounds an object.

Halo may also mean:

• The Halo Universe created by Bungie Studios
  • Halo (video game series)
  • Halo novels based on the video game series See Above The Fall of Reach, The Flood, and First Strike.
  • Halo (megastructure), the ring-shaped space stations from the video game series and novels
  • Halo (film) - A movie currently in production based on the Halo novels and games
• Halo (medicine), a medical device to immobilize head and neck after a spine fusion
• Halo (comics), a DC Comics superhero
• Halo effect in psychology
• Halo (visualization technique) that uses arcs to point users to off-screen locations
• Galactic halo, a region of space surrounding spiral galaxies
• Nuclear halo, a shape exhibited by some exotic atomic nuclei
• Halo vehicle, an automobile marketing strategy
• HALO (High Altitude Low Observability), a military aircraft under development.
• Halo, West Virginia, USA
• Halo is a variation of a Windmill (breakdancing move)
• "Halo numbers" are used to refer to official releases of the band Nine Inch Nails; see Nine Inch Nails discography
• "Halo" is a song by Depeche Mode released in 1990 on their album Violator
• "Halo" is a song by Oleander, released in 2001 in their Unwind album.
• "Halo" is a song by Foo Fighters, released in 2002 in their One By One album.
• Halo is a guitar company. Halo

HALO may stand for:

• HALO/HAHO (high altitude—low opening/high opening), a military parachuting technique
• HALO Trust (Hazardous Areas Life-Support Organisation), a charity for removing war debris

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