Also found in: Medical, Financial, Acronyms, Encyclopedia, Wikipedia.
1. A blurring or spreading of light around bright areas on a photographic image.
2. A glow around a bright object on a television screen.
(Photography) photog fogging usually seen as a bright ring surrounding a source of light: caused by reflection from the back of the film
[C19: from halo + -ation]
ha•la•tion(heɪˈleɪ ʃən, hæ-)
a blurred effect around the edges of highlight areas in a photographic image.