a ‧ men /ɑːˈmen, eɪ-/ BrE AmE interjection , noun [countable]
[ Date: 1000-1100 ; Language: Late Latin ; Origin: Greek , from Hebrew , 'truth' ]
1 . a word used to end a prayer:
Blessed be the Lord, Amen!
McAllister murmured a fervent amen.
2 . amen to that informal used to show that you agree with a suggestion or remark:
‘I think we can close the meeting now.’ ‘Amen to that.’