brough
n. countable C2 Proficiency US //ˈbɹaʊ// brough
n. a ring of light or a halo that you sometimes see around the moon or sun when the weather is changing.
n. a luminous ring or halo appearing around the sun or moon, typically caused by the refraction of light through ice crystals in the atmosphere.
The moon had a bright brough around it last night.
Sailors often watched for a brough around the moon as a sign that a storm was approaching.
The appearance of a brough is a common optical phenomenon in cold climates where high-altitude ice crystals create a distinct circular halo around celestial bodies.
Usage
Primarily used in Scottish English or northern dialects to describe atmospheric halos.