• (v. t.) The act or operation of obscuring; the state of being obscured; as, the obscuration of the moon in an eclipse.
Any phenomenon in the atmosphere, other than precipitation, that reduces the horizontal visibility in the atmosphere.
Ob`scu·ra'tion noun [ Latin obscurativ : confer French obscuration . See Obscure , transitive verb ] The act or operation of obscuring; the state of being obscured; as, the obscuration of the moon in an eclipse. Sir J. Herschel. 
obscuration 1. The act of obscuring. 2. The state of being obscured. 3. The state of being darkened or obscured; such as, the obscuration of the moon in an eclipse.