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

From BBC • Feb. 6, 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

Together, these gas flows stretch across a distance greater than 100 times the planet's diameter, or more than three times the distance between the planet and its star.

From Science Daily • Jan. 20, 2026

As a hot dry wind clears the air, I can see Frightful, my peregrine falcon, sitting in front of the six-foot-in- diameter hemlock tree that I hollowed out for a home.

From "On the Far Side of the Mountain" by Jean Craighead George