The phrase 'From SEA to Shining SEA' is a popular phrase in the United States, originally written by American poet and lyricist Carl Sandburg. It is often used to refer to the vast expanse of the United States, from the Atlantic Ocean to the Pacific Ocean. The phrase is also the title of the national anthem of the United States. The crossword solution for the term 'From SEA to Shining SEA' is SEA, which refers to the two oceans that the phrase encompasses.