quasar (plural quasars)
- (astronomy) An extragalactic object, starlike in appearance, that is among the most luminous and thought to be the most distant objects in the universe.
- QSO, quasi-stellar object
- (dated) QSR, quasi-stellar radio-source
- (obsolete) QSS, quasi-stellar source
- (obsolete) BSO, blue stellar object
An extragalactic object