Abbott-Smith Manual Greek Lexicon
ἀλήθεια (G225)
109 ἀλήθεια , -ας, ἡ ( ἀληθής ), [in LXX chiefly for אֱמֶת (on which, v. Cremer, 627f.), אֱמוּנָה ;] truth (v. DB , iv, 818f.). Objectively, "the reality lying at the basis of an appearance; the manifested, veritable essence of a matter" (Cremer, 86): Ro 9:1 , al.; of religious truth, Ro 1:25 , al.; esp. of Christian doctrine, Ga 2:5 , al.; ἀ. θεοῦ , Ro 15:8 . Subjectively, truthfulness, truth , not merely verbal (cl.), but sincerity and integrity of character: Jo 8:44 , III Jo 3 . In phrases (MM, VGT , s.v.): ἐπ’ ἀληθείας , Mk 12:14 , al.; ἀ. λέγειν ( εἰπεῖν , λαλεῖν ), Ro 9:1 , II Co 12:6 , Eph 4:25 , al.; ἀ. ποιεῖν , Jo 3:21 , I Jo 1:6 (cf. DB , iv, 818b, ff.).
G. Abbott-Smith, A Manual Greek Lexicon of the New Testament (1922) — public domain