Definition of Halo

1. Noun. An indication of radiant light drawn around the head of a saint.

Exact synonyms: Aura, Aureole, Gloriole, Glory, Nimbus
Generic synonyms: Light, Lightness

2. Noun. A toroidal shape. "A halo of smoke"
Exact synonyms: Anchor Ring, Annulus, Doughnut, Ring
Specialized synonyms: Fairy Circle, Fairy Ring
Generic synonyms: Toroid

3. Noun. A circle of light around the sun or moon.
Generic synonyms: Atmospheric Phenomenon
Specialized synonyms: Parhelic Circle, Parhelic Ring, Solar Halo

Definition of Halo

1. n. A luminous circle, usually prismatically colored, round the sun or moon, and supposed to be caused by the refraction of light through crystals of ice in the atmosphere. Connected with halos there are often white bands, crosses, or arches, resulting from the same atmospheric conditions.

2. v. t. & i. To form, or surround with, a halo; to encircle with, or as with, a halo.

Definition of Halo

1. Acronym. (aviation parachuting) High Altitude, Low Opening. — a type of skydiving, where you leave the launch platform from a high altitude, and open the parachute at a very low altitude. ¹

2. Acronym. Hazardous Area Life-Support Organisation ¹

3. Noun. (astronomy) 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. ¹

4. Noun. (astronomy) 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. ¹

5. Noun. Anything resembling this band, such as an effect caused by imperfect developing of photographs. ¹

6. Noun. (religion) nimbus, a luminous disc, often of gold, around or over the heads of saints, etc., in religious paintings. ¹

7. Noun. The metaphorical aura of glory, veneration or sentiment which surrounds an idealized entity. ¹

8. Verb. (transitive) To encircle with a halo. ¹

¹ Source:

Definition of Halo

1. to form a halo (a ring of light) [v -ED, -ING, -ES or -S]

Medical Definition of Halo

1. The cold, dense plasma formed outside the last closed flux surface during a vertical displacement event. The large currents which flow through this plasma stop the displacement and transfer the force to the vacuum vessel. If care is not taken in design, the halo currents can be large enough to threaten the structural integrity of the vacuum vessel or in-vessel components. Whereas the centre of a tokamak plasma is too hot for material probes to survive, probes (such as magnetic-field coils) can sometimes be placed in the halo, and can measure things such as the halo current. See: vertical instability. (09 Oct 1997)

Lexicographical Neighbors of Halo

hallux valgus
hallux varus
halo (current term)
halo blight
halo cast
halo current
halo effect
halo melanoma
halo nevus
halo nucleus
halo sign
halo sign of hydrops
halo spot
halo traction
halo vision

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