Oahu

American

[oh-ah-hoo] / oʊˈɑ hu /

Or O'ahu

noun

an island in central Hawaii: third largest and most important island of the state; location of Honolulu. 589 sq. mi. (1,525 sq. km).

Oahu British

/ əʊˈɑːhuː /

noun

an island in central Hawaii: the third largest of the Hawaiian Islands. Chief town: Honolulu. Pop: 876 151 (2000). Area: 1574 sq km (608 sq miles)

"Collins English Dictionary — Complete & Unabridged" 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012

Example Sentences

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Oahu

The storm was expected to dump 6-10 inches of rain on Kauai, with 4-8 inches of rain forecast for Oahu and the Big Island.

From Barron's ● Sep. 7, 2026

Elsewhere on the island of Oahu, students at the University of Hawaii make equipment bound for the moon.

From The Wall Street Journal ● Aug. 20, 2026

Field trials were conducted on a residential road on the island of Oahu, Hawaii.

From Science Daily ● Jun. 28, 2026

As floodwaters begin to recede on Oahu, residents are returning home to assess the damage and, in many cases, what’s been lost.

From Salon ● Mar. 22, 2026

He reached Honolulu in 1904, with a letter of introduction to a cousin who taught school on Oahu.

From "Farewell to Manzanar" by Jeanne Houston

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Definitions and idiom definitions from Dictionary.com Unabridged, based on the Random House Unabridged Dictionary, © Random House, Inc. 2023