The act of lip-syncing

Third-person singular simple present indicative form of lip sync

present participle of lip sync

(electronics, consumer) Standardised format of an analog picture-only television signal.

(linguistics, phonology) The contraction of a word by means of loss or omission of sounds or syllables in the middle thereof.

(intransitive) To occur at the same time or with coordinated timing. / (transitive) To cause (video and audio) to play in a coordinated way.

A swimming event where swimmers perform a synchronised routine of dance moves in the water.

synchrotron radiation

(physics) The electromagnetic radiation emitted by the acceleration of relativistic charged particles in a synchrotron or under natural conditions approximating those of a synchrotron.

(physics) A form of cyclotron in which charged particles are accelerated by an electric field that is synchronized with a magnetic field that keeps them in a circular path.