peninsula
nounA piece of land that juts out from a larger land mass and is mostly surrounded by water.
nounA piece of land almost surrounded by water, and connected with the mainland by a neck or isthmus. The Peninsula is often used absolutely for Spain and Portugal.
nounA portion of land nearly surrounded by water, and connected with a larger body by a neck, or isthmus.
nounA piece of land projecting into water from a larger land mass.
nouna large mass of land projecting into a body of water