Main Entry: ha·lo

Pronunciation: \ˈhā-(ˌ)lō\

Function: noun

Inflected Form(s): 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