AMEN

noun

1. An instance of saying ‘amen’.
2. A title of Christ; the Faithful One (especially with reference to Revelation 3:14)

verb

1. To say amen.
2. To say amen to; to ratify solemnly.

adverb

1. At the end of religious prayers: so be it.
2. In many Abrahamic religious texts and creeds: truly, verily.