Syllable division derived from spelling — this word is not in the pronouncing dictionary, so no phonetic transcription is shown rather than a guessed one.
lip-sync is a verb meaning "move the lips in synchronization (with recorded speech or song)". It carries one recorded sense.
Definitions, synonyms and semantic relations for lip-sync come from Princeton University’s WordNet. Commonness is measured against a corpus of everyday English. Full sources and licences.