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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.

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 prizes have a diameter of just over 3 inches and are less than half an inch thick.

From The Wall Street Journal • Feb. 10, 2026

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

From BBC • Feb. 6, 2026

"At the same time, changing and adjusting the diameter of the microdroplets containing a biologically active substance nanodose is only possible by varying the oil phase flow rate."

From Science Daily • Jan. 17, 2026

“Up it went,” reported William Laurence, “a great ball of fire about a mile in diameter, changing colors as it kept shooting upward, from deep purple to orange, expanding, growing bigger, rising as it expanded.”

From "Bomb" by Steve Sheinkin