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.
First Known Use: before 12th centurySee Words from the same year
: 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
What made you want to look up sea? Please tell us where you read or heard it (including the quote, if possible).
Merriam-Webster's New Words Quiz—Fall 2017 Edition!
Test your knowledge - and maybe learn something along the way.TAKE THE QUIZ
Test Your Knowledge - and learn some interesting things along the way.TAKE THE QUIZ