(also Amen ) / ɑːˈmen; NAmE ; eɪˈmen/ exclamation , noun
a word used at the end of prayers and hymns , meaning 'may it be so' :
We ask this through our Lord, Amen.
Amen to that (= I certainly agree with that) .
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WORD ORIGIN
Old English , from ecclesiastical Latin , from Greek amēn , from Hebrew 'āmēn truth, certainty, used as an adverb to express agreement, and adopted in the Septuagint as a solemn expression of belief or affirmation.