/ əˈsenʃn; NAmE / noun [ sing. ]
1.
the Ascension ( in the Christian religion ) the journey of Jesus from the earth into heaven
2.
( formal ) the act of moving up or of reaching a high position :
her ascension to the throne
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WORD ORIGIN
Middle English (referring to the ascent of Christ): via Old French from Latin ascensio(n-) , from the verb ascendere , from ad- to + scandere to climb.