- to mouth (prerecorded words) on television or film
WordReference Random House Learner's Dictionary of American English © 2026
lip-sync or lip-synch /ˈlɪpˌsɪŋk/USA pronunciation
v., -synced, -sync•ing or -synched, -synch•ing.
WordReference Random House Unabridged Dictionary of American English © 2026- Show Businessto synchronize or match lip movements and recorded sound: [no object]There was a contest to see who could lip-sync the best.[~ + object]He lip-synced all his favorite pop songs.
lip-sync
(lip′singk′),USA pronunciation [Motion Pictures, Television.]
v.t., v.i.
n.
v.t., v.i.
- Cinema, Show Businessto synchronize (recorded sound) with lip movements, as of an actor in a film.
- Cinema, Show Businessto match lip movements with (recorded speech or singing):She did a clumsy job of lip-syncing her big song.
n.
- Cinema, Radio and Televisionthe technical process by which this is done.
- Cinema, Radio and Televisionthe simultaneous recording of voice and picture, esp. the synchronization of lip movements with recorded sound.
- 1960–65
Collins Concise English Dictionary © HarperCollins Publishers::
lip-synch, lip-sync /ˈlɪpˌsɪŋk/ vb
'lip-sync' also found in these entries (note: many are not synonyms or translations):