A relation.
Reciprocal exchange of civilities, especially conversation between persons by means of letters.
Postal or other written communications.
An agreement of situations or objects with an expected outcome.
Newspaper or news stories.
A similarity between physical and spiritual things (e.g. light to wisdom, or warmth to love)
Harmony.
A music synchronization license, allowing the music to be synchronized with visual media such as films.
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.