sea

play
noun \ˈsē\

Definition of sea

  1. 1a :  a great body of salt water that covers much of the earth; broadly :  the waters of the earth as distinguished from the land and airb :  a body of salt water of second rank more or less landlocked the Mediterranean seac :  oceand :  an inland body of water —used especially for names of such bodies the Caspian Sea

  2. 2a :  surface motion on a large body of water or its direction; also :  a large swell or wave —often used in plural heavy seasb :  the disturbance of the ocean or other body of water due to the wind

  3. 3 :  something likened to the sea especially in vastness a sea of faces

  4. 4 :  the seafaring life

  5. 5 :  3mare

sea

adjective

at sea

  1. 1 :  on the sea; specifically :  on a sea voyage

  2. 2 :  lost, bewildered

to sea

  1. :  to or on the open waters of the sea

Examples of sea in a Sentence

  1. the seas of the Southern Hemisphere

  2. millions of plants and animals live in the sea

Recent Examples of sea from the Web

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.

Origin and Etymology of sea

Middle English see, from Old English sǣ; akin to Old High German sea, Goth saiws

Other Oceanography Terms



SEA Defined for English Language Learners

sea

play
noun

Definition of sea for English Language Learners

  • : 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


SEA Defined for Kids

sea

play
noun \ˈsē\

Definition of sea for Students

  1. 1 :  a body of salt water not as large as an ocean and often nearly surrounded by land

  2. 2 :  ocean 1

  3. 3 :  rough water A high sea swept the deck.

  4. 4 :  something suggesting a sea's great size or depth The speaker looked out on a sea of faces.



Seen and Heard

What made you want to look up sea? Please tell us where you read or heard it (including the quote, if possible).

Love words? Need even more definitions?

Subscribe to America's largest dictionary and get thousands more definitions and advanced search—ad free!

WORD OF THE DAY

a severe test

Get Word of the Day daily email!

Test Your Vocabulary

The Emoji Quiz

  • emoji-the-quiz
  • What phase of the moon is this: 🌖 ?
Name That Thing

Test your visual vocabulary with our 10-question challenge!

TAKE THE QUIZ
SCRABBLE® Sprint

Test Your Knowledge - and learn some interesting things along the way.

TAKE THE QUIZ

Love words? Need even more definitions?

Subscribe to America's largest dictionary and get thousands more definitions and advanced search—ad free!