name, noun ·Rare ·Advanced level

Definitions

Noun

1. 1
   The act or process of reionizing.
2. 2
   The process by which the plasma of electrons and protons is produced after the Big Bang, when stars and galaxies ionized neutral hydrogen, or the era in which this occurs.

Proper Noun

1. 1
   The epoch of reionization of the Universe, where matter decoupled from energy, and space became transparent to radiation. One of the Ages of the Universe. The cosmic era when ultraviolet radiation of the first (Population III) stars and quasars ionized neutral hydrogen, ending the Cosmic Dark Age(s).

Synonyms

All synonyms

age of reionizationepoch of reionizationera of reionizationreionization agereionization epochreionization era

Etymology

Etymology 1

From re- + ionization.

Etymology 2

From reionization.

Data sourced from Wiktionary, WordNet, CMU, and other open linguistic databases. Updated March 2026.