"Littoral" is an adjective and noun derived from the Latin littoralis, meaning "of the shore" or "of the coast." It refers to the area along the edge of a sea, lake, or river, particularly where land meets water. As an adjective, "littoral" is often used to describe ecosystems, environments, or regions that exist along coastal zones, where land and water interact. The littoral zone is a dynamic space that includes beaches, tidal areas, and shallow waters, often teeming with unique wildlife adapted to these transitional environments.

In a broader sense, "littoral" can also describe anything related to the shore or coastal regions, such as littoral currents, littoral vegetation, or even human activities along the coast. It evokes a sense of natural beauty and the continuous movement between land and sea.