- Communications satellite
- The Commission on Science and Technology for Sustainable Development in the South (Asia) or COMSATS
- COMSAT (Communications Satellite Corporation)
- Comsat Angels, a 1980s-90s British post-punk band, named after the J.G. Ballard short story, The Comsat Angels. (A.k.a. C.S. Angels during a temporary lawsuit brought on by the satellite company COMSAT.)
- The UNIX comsat daemon (used to notify users of incoming mail)
Extensive Definition
Comsat(s) can mean: