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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 cost for treating oak wilt, or any tree disease that requires a fungicide injection, depends on the tree’s diameter at breast height, or DBH.

From The Wall Street Journal • Feb. 4, 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

With the thumb and forefinger of his left hand he made a small “o” about the size of the bit, which was an inch and a half in diameter.

From "Where the Red Fern Grows" by Wilson Rawls