Tonga Trench

American  

[tong-guh trench] / ˈtɒŋ gə ˈtrɛntʃ /

noun

1. an oceanic trench in the South Pacific Ocean that lies as a nearly linear stretch from the northern end of the Kermadec Trench northward to an area south of Samoa, with rates of convergence along the two trenches’ subduction system being among the world’s fastest: the deepest trench in the Southern Hemisphere and the site of the Horizon Deep.

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Etymology

Origin of Tonga Trench

First recorded in 1910–15; named after the Tonga archipelago

Example Sentences

And Prof Jamieson will shortly be undertaking dives in Bakunawa that will investigate the world's second deepest location - Horizon Deep, in the Pacific's Tonga Trench, where the seafloor is 10,816m below the surface.

From BBC • May 16, 2024

Vescovo tells the writer when they meet aboard his ship en route to the Tonga Trench.

From Scientific American • Jun. 20, 2023