noun, verb ·Rare ·Advanced level

Definitions

Noun

1. 1
   An increase in the wavelength of a photon or of light, corresponding to a lower frequency and a shift toward the red end of the electromagnetic spectrum. countable, uncountable
2. 2
   (astronomy) a shift in the spectra of very distant galaxies toward longer wavelengths (toward the red end of the spectrum); generally interpreted as evidence that the universe is expanding wordnet

Verb

1. 1
   (ergative) (said of light or a photon) To shift toward the red end of the electromagnetic spectrum; to change to a longer wavelength and a lower frequency.

Synonyms

All synonyms

red shiftcosmological redshiftdetermine redshiftexpansion redshiftgravitational redshiftgravity redshift

Antonyms

All antonyms

blue shiftblueshiftblueshifted

Etymology

From red + shift.