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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

This layer leaves only a circular opening with a diameter of 200 nanometers at the center.

From Science Daily • Mar. 4, 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

Measuring roughly 55 feet long and 18 feet wide, the float featured a dense seascape of corals, fish and oversize sea stars, some spanning 4 feet in diameter.

From Los Angeles Times • Jan. 3, 2026

The throat diameter that I had so carefully calculated and Mr. Caton and his buddies had so precisely machined was now an ugly, oblong, pitted abomination.

From "October Sky" by Homer Hickam