Definition of sea
- the Mediterranean sea
- the Caspian Sea
- heavy seas
- a sea of faces
the seas of the Southern Hemisphere
millions of plants and animals live in the sea
These example sentences are selected automatically from various online news sources to reflect current usage of the word 'sea.' Views expressed in the examples do not represent the opinion of Merriam-Webster or its editors. Send us feedback.
: the salt water that covers much of the Earth's surface ( literary )
: a large body of water that is part of the sea or that has land around part or all of it
: an area of the sea
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