lip sync lip sync: Denotes a lip sync Ton at movies. In addition, lip sync describes a playback device technology that slightly delays the sound as the image processing effort increases in order to keep the image and sound in sync. Similar entries 100 V technology 1080 1080p 16:9 switching 200 Hz technology 24p 3/2 pull down AAC AACS tap acuity Adobe YCC601 BEA AFC AGC