Quick Definition
a young man, youth
Strong's Definition
a youth (up to about forty years)
Derivation: from a derivative of G3501 (νέος);
KJV Usage: young man
Thayer's Greek Lexicon
νεανίας, νεανίου, ὁ (from νέαν, and this from νέος; cf. μεγιστάν (which see), ξυνάν), from Homer down; Hebrew πΗςΗψ and αΘΜηεΜψ; a young man: Act_20:9; Act_23:17, and R G in 18 (so here WH text), 22; it is used as in Greek writings, like the Latinadulescens and the Hebrew πΗςΗψ (Gen_41:12), of men between twenty-four and forty years of age (cf. Lob. ad Phryn., p. 213; (Diogenes Laërtius 8, 10; other references in Stephanus' Thesaurus, see under the words, νεᾶνις, νεανίσκος): Act_7:58.
Mounce Concise Greek Dictionary
νεανίας neanias 3x
a young man, youth, Act_20:9 ; Act_23:17 ;
used of one who is in the prime of life, Act_7:58
Abbott-Smith Greek Lexicon
νεανίας , -ου , ὁ
( < νεάν = νέος ),
[in LXX for H5288 , H970 ;]
a young man: Act_7:58 ; Act_20:9 ; Act_23:17-18 .†
Moulton & Milligan — Vocabulary of the Greek NT
νεανίας [page 423]
νεανίας is restored in P Oxy III. 471 .114 (ii/A.D.) with reference to a boy of seventeen who had not been sent ἐπὶ τὰ ] διδασκ̣α̣λε [ῖ ]α̣ κα̣[ὶ ] τ [ὰς προ ]σηκούσας τοῖς ν̣[εανί ]α [ις ] τριβ [ά ]ς , to the schools and the exercises proper for the young (Edd.) : cf. Syll 425 (= .3 546B) .25 (B.C. 216 14) εἰς τὸ ἔλαιον τοῖς νεανίοις ( l. αις ) στατῆρας δέκα . For νεανιεύομαι of acting with youthful recklessness see P Grenf II. 78 .9 (A.D. 307). The word is derived from a hypothetical abstract noun *νε ϝᾱ . youth (Boisacq, p. 659).
STEPBible — Tyndale Abridged Greek Lexicon
νεανίας, -ου, ὁ
(νεάν = νέος) [in LXX for נַעַר, בָּחוּר ;]
a young man: Act.7:58 20:9 23:17-18.†
(AS)