Antonym: land. Similar words: sear, seal, seat, at sea, nausea, season, search, disease. Meaning: [sɪː] 
n. 1. a division of an ocean or a large body of salt water partially enclosed by land 2. anything apparently limitless in quantity or volume 3. turbulent water with swells of considerable size. adj. relating to or characteristic of or occurring on the sea or ships.
n. 1. a division of an ocean or a large body of salt water partially enclosed by land 2. anything apparently limitless in quantity or volume 3. turbulent water with swells of considerable size. adj. relating to or characteristic of or occurring on the sea or ships. 
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1. Being on sea, sail; being on land, settle. 
2. The sea refuses no river.
3. In a calm sea, every man is a pilot.
4. A smooth sea never made a skillful mariner.
5. The sea has fish for every man.
6. The sea complains it wants water.
7. There's always more fish in the sea.
8. All rivers run into the sea.
9. There's as good fish in the sea as ever came out of it.
10. There are as good fish in the sea as ever came out of it.
11. Money is a bottomless sea, in which honour, conscience and truth may be drowned.
12. The sea was plainly visible in the distance.
13. She gazed at the immense expanse of the sea.
14. She never swims in the sea.
15. The storm blew over land and sea.
16. I've always had a liking for the sea.
17. Sea water percolates down through the rocks.
18. She emerged from the sea, blue with cold.
19. The sea was as calm as a millpond.
20. Much of the world is covered by sea.
21. We travelled by land until we reached the sea.
22. Air mail is quicker than sea mail.
23. The ship successfully underwent sea trials in coastal waters.
24. I'm terrified of flying I'd rather go by sea.
25. The sea was calm and still.
26. The sea stretched away to the distant horizon.
27. We saw many boats sailing on the sea.
28. The sea was the colour of slate.
29. I am cought between the devil and the deep blue sea.
30. You will never enjoy the world aright, till he sea itself floweth in your vein, till you are clothed with the heavens,(Sentencedict.com) and crowned with the stars.