Cambridge Dictionaries online Cambridge Dictionaries online

The most popular online dictionary and thesaurus for learners of English


English definition of “diamond”


noun [C/U] (STONE)   /ˈdɑɪ·mənd, -ə·mənd/
an extremely hard, valuable stone prized as a jewel and having many uses in industry: [U] a diamond engagement ring
(Definition of diamond noun (STONE) from the Cambridge Academic Content Dictionary © Cambridge University Press)
Focus on the pronunciation of diamond

More American English definitions for “diamond”

Definitions of “diamond” in other dictionaries

Word of the Day


a journey on a large ship for pleasure, during which you visit several places

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