live on is a verb meaning "continue to live and avoid dying". It carries one recorded sense.
continue to live and avoid dying
“We went without water and food for 3 days”
“These superstitions survive in the backwaters of America”
“The race car driver lived through several very serious accidents”
“how long can a person last without food and water?”
“One crash victim died, the other lived”
Definitions, synonyms and semantic relations for live on come from Princeton University’s WordNet. Commonness is measured against a corpus of everyday English. Full sources and licences.