A weather system on the planet Jupiter which measures over 10,000 km across and has persisted at least since the beginning of telescopic observations.
〔天文〕大红斑
Definition of Great Red Spot in US English:
Great Red Spot
proper noun
Astronomy
A weather system on the planet Jupiter which measures over 6,200 miles (10,000 km) across and has persisted at least since the beginning of telescopic observations.