Skip to definition.
Get the FREE one-click dictionary software for Windows or the iPhone/iPad and Android apps


Noun: quasar  'kwey,zaa(r)
  1. A very luminous astronomical object observable to very high redshift (and hence distance from us); thought to be associated with an active galactic nucleus where material merges into a supermassive black hole
    - quasi-stellar radio source, QSO

Derived forms: quasars

Type of: celestial body, heavenly body

Encyclopedia: Quasar, Redshifts and Controversies