life belt is a noun meaning "belt attaching you to some object as a restraint in order to prevent you from getting hurt". It carries 2 recorded senses.
belt attaching you to some object as a restraint in order to prevent you from getting hurt
a life preserver in the form of a ring of buoyant material
Definitions, synonyms and semantic relations for life belt come from Princeton University’s WordNet. Commonness is measured against a corpus of everyday English. Full sources and licences.