[ out-uh v-singk ]
/ ˈaʊt əvˈsɪŋk /

adjective, adverb

Movies. (in the editing or projection of film) referring to any situation in which the sound does not correspond to the lip movements of an actor or to any other sound source on the screen.
not synchronized.

Origin of out-of-sync

First recorded in 1945–50
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019