0 a type of air pollution that is a mixture of ash (= the soft grey or black powder that is left after a substance has burned) from a volcano, sulphur dioxide, and other gases:
Many residents awoke to find their homes enveloped in a thick layer of vog yesterday morning.
The volcano spawns acid rain and a type of bluish smog that volcanologists call vog, which can affect large swaths of Europe.
Last week, light winds from the south allowed thick vog to collect over much of the rest of the Big Island and to drift up the island chain.
