sea / see are similar-sounding terms with different meanings (referred to as homophones). To better understand the differences, see below for definitions, pronunciation guides, and example sentences using each term. 👇
sea: (noun) a division of an ocean or a large body of salt water partially enclosed by land. (noun) turbulent water with swells of considerable size.
see: (noun) the seat within a bishop's diocese where his cathedral is located. (verb) perceive by sight or have the power to perceive by sight. (verb) deem to be. (verb) be careful or certain to do something; make certain of something. (verb) go to see for professional or business reasons. (verb) go to see for a social visit. (verb) receive as a specified guest. (verb) see and understand, have a good eye. (verb) deliberate or decide. (verb) observe as if with an eye. (verb) accompany or escort. (verb) match or meet.
sea: s·IY
see: s·IY
(Examples are Wikipedia snippets under the CC ShareAlike 3.0 license. Definitions drawn from WordNet.)