Lexical Definition

‎ἀμήν‎ amḗn (am-ane') amen ^H:INJ
of Hebrew origin (‎אָמֵן‎)

amen, verily.

• properly, firm, i.e. (figuratively) trustworthy
• adverbially, surely (often as interjection, so be it)

Abbott-Smith

ἀμήν, indecl. (Heb. אָמֵן, verbal adj. fr. אמן, to prop, ni., be firm), [in LXX: I Ch 16:36, I Es 9:46, Ne 5:13 8:6, To 8:8 14:15, III Mac 7:23, IV Mac 18:24 (elsewhere א״ is rendered ἀληθινός, Is 65:16; ἀληθῶς, Je 35 (28):6*; γένοιτο, Nu 5:22, De 27:15ff., III Ki 1:36, Ps 40 (41):13* 71 (72):19* 105 (106):48*, Je 11:5)*.]
1. As adj. (cf. Is 65:16), ὁ ἀ., Re 3:14.
2. As adv.,
(a) in solemn assent to the statements or prayers of another (Nu 5:22, Ne 5:13 8:6 etc.): ὁ ἀ., I Co 14:16;
(b) similarly, at the end of one's own prayer or ascription of praise: Ro 1:25 15:33, Ga 1:5, I Ti 1:17;
(c) in the Gospels, exclusively, introducing solemn statements of our Lord, truly, verily: Mt 5:18, 26 Mk 3:28 (v. Swete, in l.), Lk 4:24, al.; ἀ. ἀ., always in Jo 1:52 3:3 5:19, al.; τὸ ναί, καὶ . . . τὸ ἀ., II Co 1:20 (on usage in π., v. MM, VGT, s.v.).

Abbott-Smith References

Liddell-Scott-Jones

ἀμήν,

Hebrew adverb verily, of a truth, so be it, [LXX]; at beginning of sentence, [NT]

_{LSJ Scripture Refs: LXX.1Chr.16.36 ☩ Matt.5.18 ☩ John.1.51 ☩ 1Cor.14.16}