Open Sea Definition

noun
The expanse of sea away from any coastlines, bays, inlets, etc.
Webster's New World
Webster's New World
The open sea is the middle of the ocean or sea without land in sight.
An example of open sea is the middle of the Pacific Ocean.
YourDictionary
Synonyms:
  • the waves
  • the deep
  • the briny deep
  • high-seas
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Other Word Forms of Open Sea

Noun

Singular:
open sea
Plural:
open seas

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