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Definitions

diameter

[dahy-am-i-ter] / daɪˈæm ɪ tər /
NOUN
measurement across object
Synonyms


Example Sentences

Examples are provided to illustrate real-world usage of words in context. Any opinions expressed do not reflect the views of Dictionary.com.

Saturn's magnetosphere is enormous, extending to more than 10 times the planet's diameter.

From Science Daily • Apr. 3, 2026

With a steady hand, she manoeuvred a huge wind turbine section, five metres in diameter, across the yard.

From Barron's • Mar. 7, 2026

The device measures approximately 10 cm in diameter and 30 cm long and has a red anodised finish.

From BBC • Feb. 6, 2026

Some early models of the satellite dishes measured 16 feet in diameter, and hundreds of thousands of them sprouted up across the country.

From The Wall Street Journal • Jan. 22, 2026

Protons and neutrons are about 10~12 centimeters in diameter.

From "Innumeracy: Mathematical Illiteracy and Its Consequences" by John Allen Paulos