The meaning of the Acronym HALO is...

HALO is

• High Altitude Long Operation

More Meanings For HALO:

• Husker Angels Loving Others
• High Altitude Low Opening
• High Altitude Observatory
• High Altitude Low Open
• High Altitude Long Operation
• High Angle Lift Off
• Hospital Affiliated Lobbyist Organization
• Hand Action Launches Orgasm
• Ham And Lettuce Ouch
• Hispanic American Leadership Organization
• Huge Ass Large Ovoid
• Horizonal Application Layer Overlay
• High Automation Low Operating

HALO is also in:

• Adults
• Funnies
• Military
• NASA
• Transportation
• Unfiled
• Universities
• US Government