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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151. Lowered sea levels exposed the shallow continental shelf beneath the Bering Sea.
152. The government declared that it did not dump radioactive waste at sea.
153. He is from the Isle of Man in the Irish Sea.
154. The Shetlands are famed for their colonies of sea birds.
155. They were detected at depths of more than a kilometre in the sea.
156. They narrowly escaped shipwreck in a storm in the North Sea.
157. Some of the salt that we use is obtained from the sea.
158. The air was fragrant with scents from the sea and the hills.
159. The waves washed over the sea embankment with a loud crashing noise.
160. The wild weather did not deter some people from swimming in the sea.
161. We're probably at an elevation of about 13,000 feet above sea level. Sentencedict.com
162. A third brigade is at sea, ready for an amphibious assault.
163. The quay looked like a long stone road going into the sea.
164. It lies between the plain and the sea at an oblique angle to the coastline.
165. The contamination of the sea around Capri may be just the beginning.
166. An overdose of sun, sea, sand and chlorine can give lighter hair a green tinge.
167. 1,654 passengers were transferred at sea to a Norwegian cruise ship.
168. The Nile flows from Lake Victoria in East Africa north to the Mediterranean Sea.
169. The children were brazenly stripping off and leaping into the sea.