located, carried on, or used under the surface of the sea: undersea life.


Origin of undersea

First recorded in 1605–15; under- + sea
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019

Examples from the Web for undersea

Contemporary Examples of undersea

Historical Examples of undersea

British Dictionary definitions for undersea


adjective, adverb Also: underseas (ˌʌndəˈsiːz)

below the surface of the sea
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012

Word Origin and History for undersea

1610s, from under + sea.

Online Etymology Dictionary, © 2010 Douglas Harper