- Also Ikaria. a Greek island in the Aegean Sea: a part of the Southern Sporades group. 99 sq. mi. (256 sq. km).
- any of the former Utopian communities founded by the followers of Étienne Cabet, especially the one established at Nauvoo, Illinois, in 1849.
- a Greek island in the Aegean Sea, in the Southern Sporades group. Area: 256 sq km (99 sq miles)Modern Greek name: Ikaría Also called: Nikaria