noun ·Rare ·Advanced level

Definitions

Noun

1. 1
   Initialism of coastal motor boat. abbreviation, alt-of, countable, initialism
2. 2
   (cosmology) the cooled remnant of the hot big bang that fills the entire universe and can be observed today with an average temperature of about 2.725 kelvin wordnet
3. 3
   Initialism of cosmic microwave background. abbreviation, alt-of, initialism, uncountable

Synonyms

All synonyms

cbrcmbrcosmic background radiationcosmic background radiationcosmic microwave backgroundcosmic microwave background radiation

Related phrases

coastal motor boatcosmic microwave background

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