- a geometric shape, usually in the form of a disk, circle, ring, or rayed structure, traditionally representing a radiant light around or above the head of a divine or sacred personage, an ancient or medieval monarch, etc.
- an atmosphere or quality of glory, majesty, sanctity, or the like: The "profession" of a medieval lord cast a halo around him and made him a ruler of men.
- any of a variety of bright circles or arcs centered on the sun or moon, caused by the refraction or reflection of light by ice crystals suspended in the earth's atmosphere and exhibiting prismatic coloration ranging from red inside to blue outside (distinguished from corona).
- a spherical cloud of gas clusters and stars that form part of a spiral galaxy.
- any of various other things resembling a halo, especially a lighter or differently colored area surrounding an object: I think the scab was from some kind of bite, and now there's a halo around it with bruising.
- Heiligenschein.
- an undesirable bright or dark ring surrounding an image on the fluorescent screen of a television tube, due to some fault either in transmission or reception.
- to surround with a halo.
- to form a halo.
- a combining form meaning “salt,” used in the formation of compound words (halophyte); sometimes specialized as a combining form of halogen (halothane).
- a disc or ring of light around the head of an angel, saint, etc, as in painting or sculpture
- the aura surrounding an idealized, famous, or admired person, thing, or event
- a circle of light around the sun or moon, caused by the refraction of light by particles of ice
- a spherical cloud of stars surrounding the Galaxy and other spiral galaxies
- to surround with or form a halo
- indicating salt or the sea
- relating to or containing a halogen
