oceanic abyss

/ˈoʊʃiˌænɪk əˌbɪs/

Other forms: oceanic abysses

Definitions of oceanic abyss

1. noun

   a long steep-sided depression in the ocean floor
   synonyms: deep, trench

   examples:

   Atacama Trench

   a depression in the floor of the Pacific Ocean off the coast of Chile

   Bougainville Trench

   a depression in the floor of the Pacific Ocean between New Guinea and the Solomon Islands

   Japan Trench

   a depression in the floor of the Pacific Ocean to the northeast of Japan that reaches depths of 30,000 feet

   Nares Deep

   a depression in the floor of the Atlantic Ocean to the north of Haiti and Puerto Rico

   type of:

   depression, natural depression

   a sunken or depressed geological formation