κανών, 
κανόνος, 
ὁ (
κάννα, Hebrew 
קָנֶה a cane, reed; Arabic:  a reed, and a spear, and a straight stick or staff (cf. 
Vanicek, Fremdwörter etc., p. 21)), properly, a rod or straight piece of rounded wood to which anything is fastened to keep it straight; used for various purposes (see 
Passow (or Liddell and Scott), under the word); a measuring rod, rule; a carpenter's line or measuring tape, Schol. on 
Euripides, Hippolytus, 468; hence, equivalent to 
τό μέτρον τοῦ πηδηματος (
Pollux, Onom. 3, 30, 151), the measure of a leap, as in the Olympic games; accordingly in the N. T. 
1. "a definitely bounded or fixed space within the limits of which one's power or influence is confined; the province assigned one; one's sphere of activity": 
2 Corinthians 10:13, 
15f. 
2. Metaphorically, 
any rule or standard, a principle or law of investigating, judging, living, acting (often so in classical Greek, as 
τοῦ καλοῦ, 
Euripides, Hec. 602; 
ὁροι τῶν ἀγαθῶν καί κανονες, 
Demosthenes, pro cor., p. 324, 27): 
Galatians 6:16; 
Philippians 3:16 Rec. Cf. Credner, Zur Gesch. des Kanons (Hal., 1847), pp. 6ff; (especially Westcott, The Canon of the N. T., Appendix A; briefly in 
B. D. under the word  
Canon of Scripture; for examples of later usage see 
Sophocles' Lexicon, under the word). 
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BLB Scripture Index of Thayer's