n. a coral reef off the southern coast of Florida

n. a submerged bank of sand near a shore or in a river; can be exposed at low tide

n. a sandbank in a stretch of water that is visible at low tide

n. a submerged (or partly submerged) ridge in a river or along a shore; "the boat ran aground on a submerged bar in the river"

n. one of several strips across a sail that can be taken in or rolled up to lessen the area of the sail that is exposed to the wind

n. a narrow strip of land that juts out into the sea