definition of
halo

[1] #1 halo n. [aura, aureole, nimbus, glory, gloriole] an indication of radiant light drawn around the head of a saint. wn

[2] #2 halo n. [ring, annulus, doughnut, anchor ring] a toroidal shape; "a ring of ships in the harbor"; "a halo of smoke". wn

[3] #3 halo n. a circle of light around the sun or moon. wn