Meaning

1. To cause two or more events or actions to happen at exactly the same time or same rate, or in a time-coordinated way.
2. To cause two or more events or actions to happen at exactly the same time or same rate, or in a time-coordinated way.
3. To set (a clock or watch) to display the same time as another.
4. To cause (a set of files, data, or settings) on one computer or device to be (and try to remain) the same as on another.
5. To agree, be coordinated with, or complement well.
6. To coordinate or combine.