Used other than figuratively or idiomatically: see in, sync.
The TV and the speakers are in sync.
Working well together; agreeing with each other.
Antonym: out of sync
After Gecko 2.0, the version number was bumped to 5.0 to match Firefox 5, and from then on has been kept in sync with the major version number for both Firefox and Thunderbird, citation to reflect the fact that it is no longer a separate component. Source: Internet
Anthony Huxley and Kristen Segin, clad in fire engine red polo tops, faced each another, in sync yet apart, as they circled the tiny stage with flexed wrists; suddenly, their feet burst into a spray of small kicks. Source: Internet
Biden’s remarks were in sync with a compressed Democratic convention that focused less on policy priorities and more on casting as wide a net as possible to assemble a coalition to win. Source: Internet
Citrus and pecans are emerging in sync with holiday cheer. Source: Internet
Crew teams understand the importance of unity; they must row in sync. Source: Internet
As hip hop's popularity grew, performers began speaking (" rapping ") in sync with the beats, and became known as MCs or emcees. Source: Internet