/
ˈheɪləʊ/
n.
 (pl. haloes or halos)
  - (in a painting) a circle of light surrounding the head of a holy person.
 - a circle of light round the sun or moon caused by refraction through ice crystals in the atmosphere.
 
v.
 (haloes, haloing, haloed)
 surround with or as if with a halo.
Etymology
C16: from med. L., from L. halos, from Gk halōs ‘disc of the sun or moon’.