Syllable division derived from spelling — this word is not in the pronouncing dictionary, so no phonetic transcription is shown rather than a guessed one.
life-size is an adjective meaning "being of the same size as an original". It carries one recorded sense.
being of the same size as an original
“a life-size sculpture”
Definitions, synonyms and semantic relations for life-size come from Princeton University’s WordNet. Commonness is measured against a corpus of everyday English. Full sources and licences.