Also found in: Dictionary, Thesaurus, Medical, Legal, Acronyms.
ground fog[′grau̇nd ‚fäg]
A fog that hides less than 0.6 of the sky and does not extend to the base of any clouds that may lie above it.
A shallow fog caused by radiation cooling the ground at night. It normally covers more than half the sky and is not part of the cloud base.