Quick Definition
length
Strong's Definition
length (literally or figuratively) length.
Derivation: probably akin to G3173 (μέγας);
Thayer's Greek Lexicon
μῆκος, μηκεος (μήκους), τό, from Homer down; the Sept. very often for ΰΙψΖκ; length: Rev_21:16; τό πλάτος καί μῆκος καί βάθος καί ὕψος, language used in shadowing forth the greatness, extent, and number of the blessings received from Christ, Eph_3:18.
Mounce Concise Greek Dictionary
μῆκος mēkos 2x
length, Eph_3:18 ; Rev_21:16
Abbott-Smith Greek Lexicon
μῆκος , -εος (-ους ), τό ,
[in LXX chiefly for H753 ;]
length: Eph_3:18 , Rev_21:16 .†
Moulton & Milligan — Vocabulary of the Greek NT
μῆκος [page 409]
μῆκος , length, of space, size, is seen in P Ryl II. 224 ( a ) .9 (ii/A.D.) μήκο (υς ) πηχῶν [.] : cf. P Lond 755 verso .4 al. (iv/A.D.) (=111. p. 222f.). The reference is to time in P Leid W iii. 3 (ii/iii A.D.) (=11. p. 89) σύρισον ἐπὶ μῆκος , and OGIS 666 .27 (A.D. 54 68) διὰ τὸ μῆκος τοῦ [χρό ]νο [υ .
Liddell-Scott — Intermediate Greek Lexicon
μῆκος [Etym: μακρός] "length", Od. ; ἐν μήκει καὶ πλάτει καὶ βάθει Plat. ; μ. ὁδοῦ Hdt. ; πλοῦ Thuc. : —in pl., τὰ μέγαλα μ. great "distances", Plat. of persons, "height, tallness, stature", Od. of Time, Aesch. , etc.:—also μ. λόγου, μ. τῶν λόγων a "long" speech, id=Aesch. ; ἐν μήκει λόγων Thuc. τὸ μῆκος or μῆκος absol. as adv. "in length", Hdt. , etc.:— "at length, in full", οὐ μῆκος ἀλλὰ σύντομα Soph. μῆκος "in height", Od.
STEPBible — Tyndale Abridged Greek Lexicon
μῆκος, -εος (-ους), τό
[in LXX chiefly for אֹרֶךְ ;]
length: Eph.3:18, Rev.21:16.†
(AS)