"Amen" is generally used as an adverb of assent or confirmation-fiat, "so let it be." (fromInternational Standard Bible Encyclopaedia, Electronic Database Copyright © 1996, 2003, 2006 by Biblesoft, Inc. All rights reserved.)
New Covenant: "Otherwise, if you bless with the spirit, how will he who occupies the place of the uninformed say 'Amen' at your giving of thanks, since he does not understand what you say?" (1 Corinthians 16:14; NKJV)
Jason Cicero