1. To occur, operate, or function at the same time as someone or something else. On my signal, we'll synchronize with bravo team and strike the hideouts at exactly the same time. The various machines have to synchronize perfectly with one another in order for the assembly line to function correctly.

2. To coordinate and operate in unison with someone or something else. I want you to synchronize with Sarah on this project so that you are both making progress in tandem. The new app helps you synchronize with your employees around the globe.