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Learner's definition of SEA  
: the salt water that covers much of the Earth's surface
— often used with the — often used before another noun
— see also high seas
   b  [count] 
: a large body of water that is part of the sea or that has land around part or all of it
— see color picture on this pagesee also seven seas
[count]  : an area of the sea — used to describe the movement of the water in the sea — often plural
[count]  : a large amount or number of people or things spread over a large area — usually singular — sometimes used figuratively
: one of the large, flat areas on the moon or on Mars

at sea

: sailing or traveling on the sea
: confused and not confident

between the devil and the deep blue sea

— see devil

fish in the sea

— see 1fish

go to sea

somewhat old-fashioned
: to become a sailor

out to sea

: toward or into a part of the ocean that is far away from land

put (out) to sea

: to leave a port, harbor, etc., and begin traveling on the sea
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Comments & Questions
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