What does marine mean?
Marine is an English word with meanings connected broadly and specifically with the sea. As an adjective, it can describe the ocean itself, marine organisms, habitats, processes, or activities taking place in saltwater. It is especially common in scientific and environmental contexts, as in “marine biology,” “marine ecosystem,” and “marine conservation.” As a noun, “marine” can refer to a member of the United States Marine Corps, with the capitalized form “Marine” especially associated with that institution. More broadly, it may refer to a soldier or person serving at sea, though “mariner” is more commonly used for a traditional sailor. The word is related to other English terms deriving from Latin roots meaning “of the sea,” including maritime, mariner, marinate, and submarine. In general use, marine emphasizes the ocean and its living environment, while maritime more often concerns shipping, navigation, boundaries, or legal matters.
Relating to the sea or to organisms and environments in the sea.
"The policy aims to protect marine habitats around the coast."
In scientific and environmental contexts, marine commonly describes saltwater environments and the organisms that live in them.
A member of the United States Marine Corps; less commonly, a person serving at sea.
"A Marine greeted the delegation at the base."
The capitalized form “Marine” is the usual designation for a member of the US Marine Corps.
Used especially for members of the United States Marine Corps; the plural is also used more generally for people serving in a marine force.
"The marines completed their training in harsh weather."
From the Latin word for “of the sea,” marine is a reminder that an immense vocabulary of words about oceans and navigation grew from a single ancient root.
Reviewed by Deb Chak, Editor. AI-assisted content curated by RJS Tech Solutions LLP.
Where does marine come from?
Marine comes through French from Latin marinus, meaning “of the sea,” which was formed from mare, “sea.” English has used the word since the late medieval period for matters relating to the sea. It belongs to a wider family of English borrowings from Latin, including maritime, mariner, marinate, and submarine.
Related word forms
How marine is actually used
Marine is broad and often implies the sea, ocean environments, or organisms living in salty water. In the United States, the capitalized noun “Marine” specifically refers to a member of the Marine Corps; in other contexts, “marine” may be used for a sailor or a member of a marine force.
Easily confused with marine
Marine commonly describes the sea or its organisms, while maritime more often describes activities, laws, or matters connected with shipping and the sea.
Marine can be an adjective relating to the sea or a noun for a member of the US Marine Corps, whereas a mariner is traditionally a sailor or someone who navigates a ship.