halo

noun11

1. •
   nimbus, a luminous disc, often of gold, around or over the heads of saints, etc., in religious paintings.
2. •
   a circular annulus ring, frequently luminous, often golden, floating above the head
3. •
   The metaphorical aura of glory, veneration or sentiment which surrounds an idealized entity.

   • her halo slipped
4. •
   A circular band of coloured light, visible around the sun or moon etc., caused by reflection and refraction of light by ice crystals in the atmosphere.
5. •
   The bias caused by the halo effect.
6. •
   Anything resembling this band, such as an effect caused by imperfect developing of photographs.
7. •
   Ellipsis of halo headlight.
8. •
   A roll bar placed in front of the driver, used to protect the cockpit of an open cockpit racecar.
9. •
   A cloud of gas and other matter surrounding and captured by the gravitational field of a large diffuse astronomical object, such as a galaxy or cluster of galaxies.
10. •
    A circular brace used to keep the head and neck in position.
11. •
    (slang) The anabolic steroid fluoxymesterone, also known as Halotestin.

verb1

1. •
   To encircle with a halo.

noun4

1. •
   Acronym of high altitude, low opening (“a type of skydiving where one leaves the launch platform from a high altitude and opens the parachute at a very low altitude”).

   • When you have enough experience, you can do a HALO jump.
2. •
   Acronym of high altitude, low orbiting.

   • Weather balloons at maximum altitude are considered HALOs.
3. •
   Acronym of hazardous area life-support organization.
4. •
   Acronym of heavy assets, low obsolescence (“AI-resistant stocks”).

noun1

1. •
   (informal) A member of the Angels Major League Baseball team.