To be connected.
To be self-consistent and make sense; to seem plausible.
To be united in defiance.
To remain united; to stand by one another.
To be in a romantic relationship.
To correspond or fit well.
To synchronize, especially in the senses of data synchronization, time synchronization, or synchronizing music with video.
To flush all pending I/O operations to disk.
A music synchronization license, allowing the music to be synchronized with visual media such as films.
Harmony.