Fog formed when warm, moist air passes over a colder surface of land or ocean, causing the air to be cooled to its dew point and allowing water vapour to condense.
Origin
Early 20th century.
Definition of advection fog in US English:
advection fog
noun
Meteorology
Fog formed when warm, moist air passes over a colder surface of land or ocean, causing the air to be cooled to its dew point and allowing water vapour to condense.