Definition of All Souls' Eve in US English:

All Souls' Eve

(also All Souls Eve)

noun

Christian Church
  • The day or evening before All Souls' Day.

Origin

Early 19th century; earliest use found in Walter Scott (1771–1832), poet and novelist. From all + the genitive plural of soul + eve.

Pronunciation

All Souls' Eve

/ˌɔːl ˈsəʊlz ˌiːv/