1.A mythical ring of gold or light that floats a few inches over an Angels head. Can be seen in the cartoon DBZ.

2.A large Metal ring in space, spanning 10,000KM in diameter and 22.3 KM thick. Was constructed by Forerunners to house the parasitic plague called the Flood. SPins to generate gravity.
1.Hey, is that a Halo on your head?

2."Were all that's left.Halo,it's finished" -Cortana
by Michael Angelo June 23, 2004
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That one game that is far better than call of duty, uses way more teamwork and takes far better skill.
Bro1: Dude I just reached 10th prestige on COD.
Bro2: Hey guess what nobody gives a fuck, come play halo.
by yost28 January 12, 2012
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Every morning there's a halo hanging from the corner of my girlfriend's four post bed. -- "Every Morning" by Sugar Ray
by hempick June 18, 2005
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I've noticed a lot of people are assholes, and give biased definitions saying it either "r0xxorzez all t3h othar games!!11!!1!111" or "is a total fag noob shitty game" This is an unbiased definition of HALO: Combat evolved:
1:n.A first-person-shooter game for the Microsoft X-box in which the main protagonist Master Chief and his A.I. guide Cortana fight through a giant alien construct (the halo) in space alongside marines to destroy it before it eradictes all life in the universe. To further complicate things, the Covenant, a hierarchy of aliens bent on killing humans because they are believed to be inferior, have landed on the ring and believe it to be a sacred artifact, so they naturally try to defend it. Also, a parasitic plague known as the flood have been contained on the ring, and are released by the covenant. An evil and unsatiable appetite for sentient flesh drives the flood to infect and destroy all biological matter in the universe, and the Master Chief must get through them too to destroy the ring (which leads to a couple of the most annoying levels ever in game history). Halo and it's successor, HALO 2, have active online communities, as they both sport a form of online play.
2.adj.High Altitude Low Opening jump from a plane
1) Halo is an addictive fps (In my own opinion) for the Xbox. Many people say it's "linear" "repetitive" "slow" or "has crappy graphics", or that "people who think halo rules don't play fps games". I love halo, along with games like: Half-life (1 and 2), Far-Cry, The Medal of Honor and Call of Duty series, and Resistence: Fall of Man to name a few. Furthermore, people are too hooked on free-roam games with gorgeous graphics, without it occurring to them that maybe if a game has good gameplay (which i personally believe it does), then it really doesn't matter. God of War has linear gameplay with somewhat repetitive enemies, but the gameplay is so good you overlook that. People need to think more.
2. Alpha team made a HALO jump from the plane
by Lewk the Dewk April 29, 2007
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A religious symbol ussually associated with the Bible and commonly used in paintings in the medieval era of saints etc.
A First Person Shooter for Xbox with an strong storyline, amusing physics, great multiplayer, and great controls. Slightly overrated.
The young girls heart was so pure you could practically see a halo over her head.

Halo, beer, and 16 people.
by Takun June 26, 2004
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High Altitude Low Opening.
Commonly used by British SAS army forces to enter hostile or unfriendly territories.
by Diego July 08, 2003
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In military it is an abbreviation for High Altitude-Low Opening. In terms of a para-jump special forces do it to avoid detection. Soldiers are dropped from a high altitude like 10,000 ft and freefall until they reach about 500 ft or below
by Anonymous February 11, 2003
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