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Tonkin

American  
[ton-kin, tong-] / ˈtɒnˈkɪn, ˈtɒŋ- /
Also Tongking

noun

  1. a former state in northern French Indochina, now part of Vietnam.

  2. Gulf of Tonkin, an arm of the South China Sea, west of Hainan. 300 miles (485 km) long.


Tonkin British  
/ ˈtɒŋˈkɪŋ, ˈtɒnˈkɪn /

noun

  1. a former state of N French Indochina (1883–1946), on the Gulf of Tonkin: forms the largest part of N Vietnam

  2. an arm of the South China Sea, bordered by N Vietnam, the Leizhou Peninsula of SW China, and Hainan Island. Length: about 500 km (300 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

Examples are provided to illustrate real-world usage of words in context. Any opinions expressed do not reflect the views of Dictionary.com.

“This transaction represents a compelling opportunity for Vault shareholders,” said Vault CEO Luke Tonkin.

From The Wall Street Journal • May 5, 2026

To do so, they used two isolated incidents of North Vietnamese patrol boats attacking a naval destroyer in the Gulf of Tonkin.

From Salon • Sep. 7, 2025

"We were on tenterhooks in the sale room, it just kept going and going, it was wonderful, truly wonderful," said Jennifer Tonkin of auctioneers Bonhams.

From BBC • Jun. 6, 2025

The series compellingly addresses the Gulf of Tonkin incident, the baseless claims of William Westmoreland about impending victory, and the leaking of the Pentagon Papers.

From Slate • Apr. 30, 2025

One could walk through China, from Manchuria in the north to the Gulf of Tonkin in the south, while remaining entirely within land occupied by native speakers of Mandarin and its relatives.

From "Guns, Germs, and Steel: The Fates of Human Societies" by Jared M. Diamond

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