I. exclamation 1. uttered at the end of a prayer or hymn, meaning ‘so be it’. 2. used to express agreement or assent • amen to that!
II. noun an utterance of ‘amen’.
– origin Old English, from ecclesiastical Latin, from Greek amēn, from Hebrew ‘āmēn ‘truth, certainty’, used adverbially as expression of agreement, and adopted in the Septuagint as a solemn expression of belief or affirmation.