HALO |ˈhālō|
noun ( pl. haloes or halos )
1. a disk or circle of light shown surrounding or above the head of a saint or holy person to represent their holiness.
• the glory associated with an idealized person or thing: he has long since lost his halo for many ordinary Russians.
2. a circle of white or colored light around the sun, moon, or other luminous body caused by refraction through ice crystals in the atmosphere.
verb ( haloes, haloing, haloed ) [ with obj. ] surround with or as if with a halo.
ORIGIN mid 16th cent. (denoting a circle of light around the sun, etc.): from medieval Latin, from Latin halos, from Greek halōs ‘disk of the sun or moon.’
source | Oxford Dictionaries

HALO |ˈhālō|

noun ( pl. haloes or halos )

1a disk or circle of light shown surrounding or above the head of a saint or holy person to represent their holiness.

• the glory associated with an idealized person or thing: he has long since lost his halo for many ordinary Russians.

2a circle of white or colored light around the sun, moon, or other luminous body caused by refraction through ice crystals in the atmosphere.

verb ( haloes, haloing, haloed with obj. ] surround with or as if with a halo.

ORIGIN mid 16th cent. (denoting a circle of light around the sunetc.): from medieval Latin, from Latin halos, from Greek halōs disk of the sun or moon.

source | Oxford Dictionaries