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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See Examples For:

Oahu

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

Torrential rains caused homes and streets to flood on the northern coast of Hawaii’s Oahu on Friday, and local officials warned that a dam on the island could fail, sending more water into communities.

From The Wall Street Journal ● Mar. 20, 2026

Thousands of people along the coast there fled for higher ground as waves of 1.2m hit Oahu, and even larger ones of 1.7m struck Maui.

From BBC ● Jul. 30, 2025

Behind Fuchida, 180 Japanese planes peeled away and dove for Oahu.

From "Unbroken" by Laura Hillenbrand

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