Quick Definition
incorruptibility, soundness, integrity
Strong's Definition
incorruptibleness, i.e. (figuratively) purity (of doctrine)
Derivation: from a derivative of a compound of G1 (Α) (as a negative particle) and a derivative of G1311 (διαφθείρω);
KJV Usage: uncorruptness
Thayer's Greek Lexicon
ἀδιαφθορία, (ας, ἡ (from ἀδιάφθορος incorrupt, incorruptible; and this from ἀδιαφθείρω), incorruptibility, soundness, integrity: of mind, ἐν τῇ διδασκαλία, Tit_2:7 (L T Tr WH ἀφθορίαν). Not found in the classics.
Mounce Concise Greek Dictionary
noy given
Abbott-Smith Greek Lexicon
From a derivative of a compound of G1 (as a negative particle) and a derivative of G1311
Moulton & Milligan — Vocabulary of the Greek NT
ἀδιάφθορος [page 10]
In Syll 168 .25 (iv/B.C.) the Athenian statesman Lycurgus is praised as ἀδιάφθορον κ [αὶ ἀνεξέλεγκτον αὑτὸν ὑπὲρ ] τῆς πατρίδος . . . παρ [έχων ]. Some late MSS. give the derived noun (-ία ) in Tit_2:7 , and Grimm ingenuously traces our adjective to the verb ἀδιαφθείρω !
Liddell-Scott — Intermediate Greek Lexicon
ἀδιαφθορία "incorruption, uprightness", NTest.
STEPBible — Tyndale Abridged Greek Lexicon
incorruption, uprightness , (New Testament) (ML)