adj ·3 syllables ·Rare ·Advanced level

Definitions

Adjective

1. 1
   Existing, relating to, or made for use beneath the sea. not-comparable

   "It is not known just what action will be taken against the captain of the undersea boat."

Adjective

1. 1
   beneath the surface of the sea wordnet

Synonyms

All synonyms

burieddrownedengulfedfloodedimmersedinundated

Example

More examples

"A tsunami is a series of waves caused by earthquakes or undersea volcanic eruptions."

Etymology

From under- + sea.

Data sourced from Wiktionary, WordNet, CMU, and other open linguistic databases. Updated March 2026.