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  1. Oxford American Dictionary

    redshift

    • IPA[ˈredˈSHift]

    美式

    • n.
      the displacement of spectral lines toward longer wavelengths (the red end of the spectrum) in radiation from distant galaxies and celestial objects. This is interpreted as a Doppler shift that is proportional to the velocity of recession and thus to distance.

    • noun: red shift, plural noun: red shifts