mariana Definition

islands in the western Pacific south of the Bonin Islands; comprise the commonwealth of Northern Mariana Islands and Guam

sea floor trench in the Pacific extending from southeast of Guam to northwest of the Mariana Islands and containing the deepest known depression on Earth, at a depth of 36,198 feet (11,033 meters)

islands of the western Pacific Ocean that were part of the Trust Territory of the Pacific Islands 1947—76 and that have constituted a U.S. commonwealth since 1986; area 184 square miles (478 square kilometers), population 53,883