Definition of submarine

The word "submarine" is a combination of two Latin words: "sub," meaning "under," and "marinus," meaning "of the sea." The term first appeared in English in the early 17th century, referring to anything existing under the sea. However, the term's usage evolved to specifically refer to underwater vessels by the late 19th century. The invention and development of submersible craft, like the "Turtle" and later, the more advanced submarines, solidified the word's connection to these underwater vehicles.