The term 'broad expanse' can be defined by five crossword solutions: OCEAN (5 letters), SEA (3 letters), AREA (4 letters), ACRE (4 letters), and widewideworld (13 letters). An OCEAN is a large body of salt water that covers most of the Earth's surface. A SEA is a smaller body of salt water that is partially enclosed by land. An AREA is a region or space, usually with a defined boundary. An ACRE is a unit of measurement for land AREA, equal to 4, 840 square yards. Widewideworld is a phrase that refers to the vastness of the world. All of these terms together describe a broad expanse, which is a large, open AREA of land or water.