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Word of the Day Tuesday, June 9, 2026

diameter

/dɪˈæmɪtər/ noun · British & US
Valid in UKValid in US
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What does diameter mean?

noun

The distance across a circle or other curved figure, passing through its centre, or the length of a straight line connecting two points on a circle or other curved figure. A measure of the size of a circle.

Example

"The diameter of the Earth is approximately 12,742 kilometres."

Definition generated by AI and curated by RJS Tech Solutions LLP.

Synonyms for diameter

Antonyms of diameter

Rhymes with diameter

Etymologically related