groundhog day is a noun meaning "if the ground hog emerges and sees his shadow on this day, there will be 6 more weeks of winter". It carries one recorded sense.
if the ground hog emerges and sees his shadow on this day, there will be 6 more weeks of winter
United States
Definitions, synonyms and semantic relations for groundhog day come from Princeton University’s WordNet. Commonness is measured against a corpus of everyday English. Full sources and licences.