Cambridge Dictionaries online Cambridge Dictionaries online

The most popular online dictionary and thesaurus for learners of English

English definition of “gneiss”


noun [U]     /naɪs/ specialized
a type of metamorphic rock that contains light and dark layers formed of minerals such as quartz and micaTypes of rockPrecious and semi-precious stones
(Definition of gneiss noun from the Cambridge Advanced Learner's Dictionary & Thesaurus © Cambridge University Press)
Focus on the pronunciation of gneiss

Translations of “gneiss”

Word of the Day


a person or group who receives money, advantages, etc. as a result of something else

Word of the Day


Read our blog about how the English language behaves.

Learn More

New Words

Find words and meanings that have just started to be used in English, and let us know what you think of them.

Learn More