IPA: /ˌæpəˈrɪʃən/
KK: /æpəˈrɪʃən/
A ghostly figure or a vision that appears suddenly, often unexpectedly.
The old house was said to be haunted by an apparition that frightened visitors.
Apparition is formed from "ad-" (meaning to) and "parere" (meaning to appear). The word describes something that appears or comes into view, often in a ghostly or supernatural context.
Think of something 'appearing' ('parere') as if it is 'coming to' ('ad-') your sight — that's why apparition refers to a ghostly appearance.