|—n , pl -loes, -los|
|1.||a disc or ring of light around the head of an angel, saint, etc, as in painting or sculpture|
|2.||the aura surrounding an idealized, famous, or admired person, thing, or event|
|3.||a circle of light around the sun or moon, caused by the refraction of light by particles of ice|
|4.||astronomy a spherical cloud of stars surrounding the Galaxy and other spiral galaxies|
|—vb , -loes, -los, -loes, -los, -loing, -loed|
|5.||to surround with or form a halo|
|[C16: from Medieval Latin, from Latin halōs circular threshing floor, from Greek]|
halo ha·lo (hā'lō)
n. pl. ha·los or ha·loes
A reddish yellow ring surrounding the optic disk, caused by an expansion of the scleral ring that makes the deeper structures visible.
A ring of light surrounding a luminous body.