half-island noun2 •A piece of land which is "halfway" an island; a byland; peninsula.For some time, the Midianites controlled part of the AraBa territories of Negeb desert and the half Island of Sinai. — 2010 •An area of land occupying part or half of an island.Yunen finds the "study of the half-island" to be no better than a "half-study," one whose artificially narrow scope blocks the understanding of shared problems and the finding of shared solutions. — 2003 formshalf-islands