fountain of youth is a noun meaning "a fountain described in folk tales as able to make people young again". It carries one recorded sense.
a fountain described in folk tales as able to make people young again
“Ponce de Leon discovered Florida while searching for the Fountain of Youth”
Definitions, synonyms and semantic relations for fountain of youth come from Princeton University’s WordNet. Commonness is measured against a corpus of everyday English. Full sources and licences.