Synchronous can refer to the following meanings:
- synchronization, the coordination of events to operate a system in unison.
- Synchronization (computer science)
- Synchronization (alternating current)
- synchronicity, a term from Jungian psychology.
- Synchronicity (album), an album by The Police.
- "Synchronicity II", a song by The Police from the above album.
- Synchronicity (Olivia), an album by OLIVIA (Olivia Lufkin).
- Synchronicity Software an EDA application and company that was later acquired by MatrixOne