'apparation' originates from Latin, specifically the word 'apparitio', where the root 'apparere' meant 'to appear' or 'to come in view'.

'apparation' was used in Middle English (in forms related to Old French 'apparition') and developed from Late Latin 'apparitio'; over time the form 'apparition' became more common, while 'apparation' remained a less frequent variant.

Initially, it meant 'a coming into view or appearance'; this basic sense has largely remained, though 'apparation' is now rare and often replaced by 'apparition' in modern usage.