Quick Definition
νουμηνία, ας, ἡ n.f. the new moon as a festival
Strong's Definition
feminine of a compound of 3501 and 3376 (as noun by implication, of 2250); the festival of new moon
KJV Usage: new moon
UBS Dictionary of the Greek New Testament
noun, f. | -ας | νέος + μήν
51.5 · Festivals
new moon festival a festivity associated with the appearance of the new moon
UBS Dictionary of the Greek New Testament © United Bible Societies, licensed CC BY-SA 4.0.
Thayer's Greek Lexicon
νουμηνία, and ace. to a rarer uncontr. form (cf. Lob. ad Phryn. p. 148 [Bp. Lghtft. on Col. as below; WH. App. p. 145]) veounvia (so Ltxt. Tr WH), -as, 9, (νέος, μήν a month), new-moon (Vulg. neomenia; barbarous Lat. novilunium): of the Jewish festival of the new moon [BB.DD. 5. v. New Moon], Col. ii. 16. (Sept. chiefly for wn; also for wn ns, Ex. xl. 2; and wy win, Num. x. 10; xxviii. 11 ; see μήν, 2. Pind., Arstph.. Thue., Xen., al.)
Abbott-Smith Greek Lexicon
νεομηνία (Att. contr., νουμ-, Rec.), -ας, ἡ
(< νέος, μήν), [in LXX chiefly for חֹדֶשׁ;]
new moon: of the Jewish festival, Col 2:16.†
Liddell-Scott-Jones — Greek-English Lexicon
νουμηνία (noumēnia) — New Moon. νουμην-ία, ἡ, Attic dialect contraction for νεομηνία (which occurs in [Refs 5th c.BC+]:—also νευμηνία, [Refs 4th c.BC+]; νεμονηΐα, [Refs]; νομενία, [Refs 3rd c.BC+]:— new moon: the first of the month, Pi.[same place], [Refs 5th c.BC+], etc.; ν. κατὰ σελήνην to denote the true or natural new moon, as opposed to to the νουμηνία of the calendars, [Refs 5th c.BC+]; ν. τοῦ ἔτους, of the spring equinox, [Refs 2nd c.AD+]