# abyssal

/ɐbˈɪsəl/ (UK) · CEFR C1 · Adjective

Source: https://englishreference.com/word/abyssal
Updated: 2026-05-18

## Definition

relating to the very deep part of the ocean floor. It describes things that live in or are found in the dark, cold depths of the sea.

For teachers: relating to the deep ocean floor, specifically the region beyond the continental shelf. Often used in scientific contexts to describe geological or biological features of the deep sea.

## Examples

- The abyssal plain is covered in thick layers of mud.
- Scientists use special submersibles to study the abyssal life forms that survive in total darkness.
- The abyssal trenches represent some of the most extreme environments on Earth, where pressure is immense and sunlight cannot penetrate the surface for thousands of meters.

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