Standard Lemma guide

redshift

noun · verb · 3 senses · updated from the 2026-07-25 local source snapshot

Definitions and examples are grouped by meaning. Pronunciation, history, word forms, translations, descendants, synonyms, antonyms, derived terms, and related words appear whenever the source provides them.

Sound

Pronunciation

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  • /ˈɹɛdˌʃɪft/
  • rĕd'-shĭftˌ
  • US: Recorded audio is listed in the source snapshot.
  • rhymes with -ɛdʃɪft

1

noun

Meaning 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.

Definition source: English Wiktionary via Wiktextract

Usage: countable, uncountable

Qualifier: relativity

Topics: natural-sciences, physical-sciences, physics

No example sentence was provided for this meaning.

Meaning relationships

Synonyms: none provided

Antonyms: blueshift

2

verb

Meaning 2

(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.

Definition source: English Wiktionary via Wiktextract

Qualifier: relativity

Topics: natural-sciences, physical-sciences, physics

No example sentence was provided for this meaning.

Meaning relationships

Synonyms: none provided

Antonyms: blueshift

3

noun

Meaning 3

(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

Definition source: Princeton WordNet 3.0

No example sentence was provided for this meaning.

Meaning relationships

Synonyms: red shift

Antonyms: none provided

Broader terms: propagation

History

Etymology

From red + shift.

Across languages

Translations

38 source translations are retained for this English entry.

  • Bulgarian: червено отместване (červeno otmestvane) — increase in wavelength of light
  • Catalan: desplaçament cap al roig — increase in wavelength of light
  • Chinese: 紅移 /红移 (hóngyí) — increase in wavelength of light
  • Chinese: 红移 (hóng yí) — increase in wavelength of light
  • Czech: rudý posuv — increase in wavelength of light
  • Danish: rødforskydning — increase in wavelength of light
  • Dutch: roodverschuiving — increase in wavelength of light
  • Esperanto: ruĝenŝoviĝo — increase in wavelength of light
  • Estonian: punanihe — increase in wavelength of light
  • Finnish: punasiirtymä — increase in wavelength of light
  • French: décalage vers le rouge — increase in wavelength of light
  • German: Rotverschiebung — increase in wavelength of light
  • Hebrew: היסט לאדום — increase in wavelength of light
  • Hungarian: vöröseltolódás — increase in wavelength of light
  • Icelandic: rauðvik — increase in wavelength of light
  • Ido: redesko — increase in wavelength of light
  • Indonesian: pergeseran merah — increase in wavelength of light
  • Irish: deargaistriú — increase in wavelength of light
  • Italian: spostamento verso il rosso — increase in wavelength of light
  • Japanese: 赤方偏移 (sekihō hen'i) — increase in wavelength of light
  • Macedonian: црвено поместување (crveno pomestuvanje) — increase in wavelength of light
  • Polish: przesunięcie ku czerwieni — increase in wavelength of light
  • Portuguese: desvio para o vermelho — increase in wavelength of light
  • Russian: кра́сное смеще́ние (krásnoje smeščénije) — increase in wavelength of light
  • Serbo-Croatian: crveni pomak — increase in wavelength of light
  • Sicilian: spustamentu versu lu russu — increase in wavelength of light
  • Slovak: červený posun — increase in wavelength of light
  • Spanish: corrimiento al rojo — increase in wavelength of light
  • Spanish: desplazamiento al rojo — increase in wavelength of light
  • Swedish: rödförskjutning — increase in wavelength of light
  • Turkish: kırmızıya kayma — increase in wavelength of light
  • Vietnamese: dịch chuyển đỏ — increase in wavelength of light
  • Catalan: desplaçar-se cap al roig — to increase wavelength of light
  • Catalan: desplaçar cap al roig — to increase wavelength of light
  • Spanish: (equiv. to intransitive) correrse al rojo — to increase wavelength of light
  • Spanish: desplazarse al rojo — to increase wavelength of light
  • Spanish: correr al rojo — to increase wavelength of light
  • Spanish: desplazar al rojo — to increase wavelength of light