Mariana Trench

American  

[mair-ee-ah-nuh trench, mar-] / ˈmɛər iˌɑ nə ˈtrɛntʃ, ˈmær- /

noun

1. the world’s deepest oceanic trench, a crescent-shaped depression located in the western Pacific Ocean, south and west of the Mariana Islands: site of the Challenger Deep.

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Etymology

Origin of Mariana Trench

First recorded in 1930–35; named after the Mariana Islands

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Example Sentences

See Examples For:

Mariana Trench

Its research vessels are meticulously mapping the oceans, from the Mariana Trench to the Arctic.

From The Wall Street Journal ● Nov. 2, 2026

In 2021, the duo ventured together in a submersible to the Challenger Deep and the Sirena Deep in the Mariana Trench.

From BBC ● May 28, 2024

Microplastics have been found in even the most remote corners of the Earth, such as the Mariana Trench, the deepest oceanic trench on the planet.

From Slate ● Apr. 27, 2024

These so-called microplastics are spread throughout the water column and have been found in every corner of the globe, from Mount Everest, the highest peak, to the Mariana Trench, the deepest trough.

From National Geographic ● Feb. 21, 2024

A hug from Mom hadn’t fixed it, but it had pulled Cat’s heart from the bottom of the Mariana Trench to somewhere around sea level.

From "Caterpillar Summer" by Gillian McDunn

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