Quick Definition
καθήκω v. it is fitting
Strong's Definition
from 2596 and 2240; to reach to, i.e. (neuter of present active participle, figuratively as adjective) becoming
KJV Usage: convenient, fit
UBS Dictionary of the Greek New Testament
UBS Dictionary of the Greek New Testament © United Bible Societies, licensed CC BY-SA 4.0.
Thayer's Greek Lexicon
καθ-ήκω; [fr. Aeschyl., Soph. down]; 1. to come down. 2. to come to, reach to; impers. καθήκει, it is becoming, it is fit (cf. Germ. zukommen), Ezek. xxi. 27; ov καθῆκεν (Rec. καθῆκον), foll. by the ace. with inf., Acts xxii. 22 [W. 282 (265); B. 217 (187)]; τὰ μὴ καθήκοντα, things not fitting, i. e. forbidden, shameful, Ro. i. 28; 2 Mace. vi. 4. Cf. ἀνήκω.
Mounce Concise Greek Dictionary
καθήκω kathēkō 2x
to reach, extend to; καθήκει, impers. it is fitting, meet, Acts 22:22; τὸ καθῆκον, what is fit, right, duty; τὰ μὴ καθήκοντα, by litotes for what is abominable or detestable, Rom. 1:28*
Abbott-Smith Greek Lexicon
καθ-ήκω,
[in LXX: impers., Le 5:10, Ez 21:27 (32), al. (מִשְׁפָּט); τὰ κ., Ex 5:13, al. (דָּבָר), etc.;]
to come down, come to.
to be fit, proper: impers., c. acc. et inf., Ac 22:22 (on the tense, v. Bl., § 63, 4); τὰ μὴ καθήκοντα, Ro 1:28.†
Liddell-Scott-Jones — Greek-English Lexicon
καθήκω (kathēkō) — be fit. καθήκω, Ionic dialect κατήκω, (see. ἥκω) come or go down, especially to fight, [Refs 4th c.BC+]
2. come down to, reach to, ἐς θάλασσαν [Refs 5th c.BC+]; ἐπὶ θάλ. [Refs 5th c.BC+]; κέρκος.. εἰς λεπτὸν καθήκουσα tapering away, [Refs 4th c.BC+]
3. come in due course to any one, καθῆκεν ἐς ἡμᾶς ὁ λόγος the turn of speaking came to us, [Refs 4th c.BC+]; τῆς βολῆς καθηκούσης ἐς αὐτόν [Refs 1st c.AD+]
4. of Time, ὁπότε καθήκοι ὁ Χρόνος [Refs 5th c.BC+]; in participle, τοῦ καθήκοντος Χρόνου the normal time, [Refs 5th c.BC+]; αἱ κ. ἡμέραι the regular, proper days, [Refs 4th c.BC+]; of events, ἑορτῆς εἰς τὰς ἡμέρας ἐκείνας καθηκούσης as the festival fell on those days, [Refs 2nd c.BC+]; ἐκκλησίαν ποιῆσαι, ὅταν ἐκ τῶν νόμων καθήκῃ when it is legally due, [Refs 4th c.BC+]; ἡ κ. σύνοδος or ἐκκλησία, [Refs 2nd c.BC+]
II. to be meet, fit, proper, τοῖς κ. [νομίμοις] [Refs 4th c.BC+]; τὰς ἐσθῆτας τὰς κ. ἀεὶ ταῖς περιθεταῖς suiting them, [Refs 2nd c.BC+]; ὁ καθήκων ἐκ τῶν νομίμων ἀριθμός a quorum, [Refs 1st c.BC+]
II.2. impersonal, καθήκει μοι it belongs to me, is my duty, with infinitive, οἷς καθήκει ἁθροίζεσθαι [Refs 5th c.BC+]imperfect καθῆκε in present sense, it is meet, proper, οὐδ᾽ ἅψασθαι καθῆκέ τινων[NT]participle, τὰ καθήκοντα one's due or duty, [Refs 5th c.BC+]; ποιεῖν τὸ κ. [Refs 5th c.BC+], title of work by Zeno,[Refs]; μὴ κ. unbecoming, [NT]
II.3. τὰ κατήκοντα the present crisis, [Refs 5th c.BC+]
II.3. b τὰ καθήκοντα the payments due, [Refs 2nd c.BC+]
II.4. adverb present participle καθηκόντως fittingly, properly, [Refs 4th c.BC+]; consistently with duty, [Refs 1st c.AD+]; appropriately, with dative, τῷ τόπῳ Aristeas 81; κ. ἔχειν πρός τι [Refs]
III. τὸ καθῆκον the precise proportion, [Refs 4th c.BC+]