Definition of vastation in US English:

vastation

noun

literary
  • The action or process of emptying or purifying someone or something, typically violently or drastically.

    • ‘Reaching this point of powerlessness - of emptiness - is the vastation that Swedenborg talks about.’
    • ‘Some vastation is necessary so that our remains can be safely brought to our assistance through His mercy.’

Origin

Mid 16th century: from Latin vastatio(n-), from vastare ‘lay waste’.

Pronunciation

vastation

/vaˈstāSH(ə)n/