• synonyms


  1. beneath the surface of the sea.
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Origin of underseas

First recorded in 1675–85; undersea + -s1
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018

Examples from the Web for underseas

Historical Examples of underseas

  • A collision while underseas in a submarine is a serious matter.

    The Heads of Apex

    Francis Flagg

  • On came the destroyer until it was directly over the underseas craft.

  • But there was little time for such thoughts, as this underseas mission concerned the lives of nine young people.

    Sign of the Green Arrow

    Roy J. (Roy Judson) Snell

  • It was sepia from the cuttlefish's ink sacs—the weapon with which these monsters of the underseas blind and confuse their victims.

  • The first underseas cable was laid in 1851 between France and England.