Webster's English Dictionary

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sea

sea \'se-\ n [ME see, fr. OE s-; akin to OS & OHG se- sea] 1a: a great 
   body of salty water that covers much of the earth; broadlyX : the waters of 
   the earth as distinguished from the land and air 1b: a body of salt water 
   of second rank more or less landlocked {the Medi terranean ~} 1c: OCEAN  
   1d: an inland body of water esp. if large or if salt or brackish {the Cas 
   pian ~} 1e: a small freshwater lake {the Sea of Galilee}  2a: surface 
   motion on a large body of water or its direction; also :: rough water : a 
   heavy swell or wave 2b: the disturbance of the ocean or other body of water 
   due to the wind  3: something vast or overwhelming likened to the sea  4: 
   the seafaring life  5: MARE  1: on the sea; specif : on a sea voyage  2: 
   LOST, BEWILDERED  : to or upon the open waters of the sea  - sea aj