The apse or apsis or apside (plural: apses or apsides) are architectural features of churches Apse or apsis or apses or apsides or apside or variation, may also refer to: Apsis (or apse or apside), the nearest or farthest points of an spatial orbit Apse chapel (or apsis chapel or apside chapel or apsidal chapel; also known as the apse or apsis or apside), a part of a church that uses the apse architectural feature Apse (band), a U.S. rock band APSE, the Ada Programming Support Environment Apse Heath, Isle of Wight, UK Apse Manor, Isle of Wight, UK; a manor house Aina Apse (1926–2015), New Zealand potter See also APS (disambiguation) Apsey (disambiguation)