noun

diamond

DEYE-uh-muhnd

noun

An extremely hard, clear crystal form of carbon, prized as a gemstone.

"She was proposed to with a ring set with a single diamond."

"Diamonds are cut and polished to maximize their sparkle."

A four-sided shape with two pairs of equal angles, standing on one of its points (a rhombus).

"He drew a kite in the shape of a diamond."

One of the four suits in a standard deck of playing cards, marked with a red diamond shape.

"She played the queen of diamonds."

The infield of a baseball field, which is diamond-shaped.

"The players took the diamond as the national anthem finished."

adj

Marking a sixtieth (or, in some uses, seventy-fifth) wedding anniversary.

"They celebrated their diamond anniversary surrounded by family."

How to Use Diamond

Learner’s notes

In plain EnglishA hard, sparkling gemstone; also the four-sided card suit and rhombus shape named after it.

Common pairings

diamond ring diamond anniversary baseball diamond

diamonded past tense, diamonds plural, diamonds singular

Study it as flashcards or scroll it in Flow — saved to your collection.

Can you complete this real example?

She was proposed to with a ring set with a single _____.

From Old French diamant, from Latin adamas ("hardest metal"), from Greek adamas — the same root as "adamant." Diamond and adamant are doublets.