photo finish is a noun meaning "in general, any very close finish; in particular, a finish of a race in which the contestants are so close together that the winner must be determined from a photograph taken at the instant of finishing". It carries one recorded sense.
in general, any very close finish; in particular, a finish of a race in which the contestants are so close together that the winner must be determined from a photograph taken at the instant of finishing
Definitions, synonyms and semantic relations for photo finish come from Princeton University’s WordNet. Commonness is measured against a corpus of everyday English. Full sources and licences.