The kanji 洲 generally refers to a "sandbank," "shoal," "island," or "land surrounded by water," a piece of land that is often formed by the deposition of sediment. It implies a geographical feature related to water and land.

・On-yomi (音読み): シュウ (shū) ・Kun-yomi (訓読み): す (su)

⚫︎ 本州 (Honshū) Translation: Honshu (the largest island of Japan) ⚫︎ 中洲 (nakasu) Translation: sandbank, shoal in a river ⚫︎ アジア州 (Ajia shū) Translation: The continent of Asia

The kanji 洲 is a phono-semantic compound (形声文字, けいせいもじ). The semantic component is 水 (mizu) "water," indicating the meaning of the character. The phonetic component is 川 (kawa) "river," which gives the character its sound. Together, they combine to indicate an area of land surrounded by water, like a sandbank or island.