halo

1 of 3

noun

ha·​lo ˈhā-(ˌ)lō 

plural halos or haloes

1

: a circle of light appearing to surround the sun or moon and resulting from refraction or reflection of light by ice particles in the atmosphere

2

: something resembling a halo: such as

a

: nimbus

b

: a region of space surrounding a galaxy that is sparsely populated with luminous objects (such as globular clusters) but is believed to contain a great deal of dark matter

c

: a differentiated zone surrounding a central zone or object

d

or halo brace : an orthopedic device used to immobilize the head and neck (as to treat fracture of neck vertebrae) that consists of a metal band placed around the head and fastened to the skull usually with metal pins and that is attached by extensions to an inflexible vest

3

: the aura of glory, veneration, or sentiment surrounding an idealized person or thing

halo

2 of 3

verb

haloed; haloing; haloes

transitive verb

: to form into or surround with a halo

rainbows haloed the waterfalls

—Michael Crawford

halo-

3 of 3

combining form

see hal-

Synonyms

Noun

• aura
• atmosphere
• air

Examples of halo in a Sentence

Noun

the halo of unimpeachable honesty in which the politician had long basked

a naturalistic depiction of Saint Peter that shows him as a humble fisherman and without the traditional halo

Recent Examples on the Web

Noun

When unbound, her hair was a resplendent halo of vitality. —Literary Hub, 30 June 2025

Since then, astronomers have discovered that all large galaxies seem to be surrounded by similar haloes of what is now known as dark matter. —Robert Lea, Space.com, 27 June 2025

Verb

The mother of one recently shared an image of herself and her baby boy halo chilling in the gym and twinning, rocking matching bandanas. —Elizabeth Ayoola, Essence, 26 Sep. 2024

Is the Milky Way’s dark matter halo a smooth schmear? —Joshua Sokol, Quanta Magazine, 29 Aug. 2023

Word History

Etymology

Noun

Latin halos, from Greek halōs threshing floor, disk, halo

First Known Use

Noun

1603, in the meaning defined at sense 1

Verb

1801, in the meaning defined above

Phrases Containing halo

• halo effect

Kids Definition

halo

noun

ha·​lo

ˈhā-lō

plural halos or haloes

1

: a circle of light around the sun or moon caused by the presence of tiny ice crystals in the air

2

a

: nimbus sense 1

b

: nimbus sense 2

3

: the atmosphere of glory or sentiment surrounding a person or thing considered perfect

Medical Definition

halo

noun

ha·​lo ˈhā-(ˌ)lō 

plural halos or haloes

1

: a circle of light appearing to surround a luminous body

especially : one seen as the result of the presence of glaucoma

2

: a differentiated zone surrounding a central object

the halo around a boil

3

: the aura of glory, veneration, or sentiment surrounding an idealized person or thing

4

: an orthopedic device used to immobilize the head and neck (as to treat fracture of neck vertebrae) that consists of a metal band placed around the head and fastened to the skull usually with metal pins and that is attached by extensions to an inflexible vest

called also halo brace