Pearl Harbor

American  

noun

1. a harbor near Honolulu, on S Oahu, in Hawaii: surprise attack by Japan on the U.S. naval base and other military installations December 7, 1941.

2. any significant or crippling defeat, betrayal, loss, etc., that comes unexpectedly.

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Pearl Harbor British  

noun

1. an almost landlocked inlet of the Pacific on the S coast of the island of Oahu, Hawaii: site of a US naval base attacked by the Japanese in 1941, resulting in the US entry into World War II

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Pearl Harbor Cultural  

1. A major United States naval base in Hawaii that was attacked without warning by the Japanese air force on December 7, 1941, with great loss of American lives and ships. In asking Congress to declare war on Japan the next day, President Franklin D. Roosevelt described the day of the attack as “a date which will live in infamy.”

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Example Sentences

Pearl Harbor put an end to all that when Hitler foolishly declared war on the United States four days after the Japanese attack.

From Salon • May 21, 2026

After Pearl Harbor, fears of aerial bombardment prompted schemes to make the president’s residence less conspicuous.

From The Wall Street Journal • Apr. 10, 2026

The Pearl Harbor attack led to the US joining World War Two, after which the countries became close allies.

From BBC • Mar. 20, 2026

US President Donald Trump on Thursday startled Japan's prime minister by mentioning the 1941 attack on Pearl Harbor, a seemingly light-hearted remark sure to elicit unease in a country now a firm US ally.

From Barron's • Mar. 19, 2026

But the whole kitchen crew was too excited and upset to notice: Japanese planes had just bombed a place called Pearl Harbor.

From "The Autobiography of Malcolm X" by Alex Malcolm X;Hailey