Meaning of Mariana Trench

Mar'ian'a Trench'

Pronunciation: [key]
  1. a depression in the ocean floor of the Pacific, S and W of the Mariana Islands: site of greatest known depth of any ocean. 36,201 ft. (11,034 m) deep.
Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.