εὔ·λογος, ος, ον. :
      1 qui parle bien, SPT. Ex. 4, 10 ;
      2 plus souv. fondé en raison, raisonnable, vraisemblable (raison, prétexte, etc.) THC. 3, 82 ; DÉM. 277, 29 ; εὔλογόν (s.-e. ἐστι) avec un inf. PLAT. Crat. 396 b ; ARSTT. Pol. 3, 15, 12, il est raisonnable de ou que ; τὸ εὔλογον, THC. 4, 87, raison plausible, vraisemblance ; ἐκ τῶν εὐλόγων, POL. 10, 44, 6, selon toute vraisemblance.

• Cp. -ώτερος, PLAT. Rsp. 352 a ; ARSTT. Nic. 1, 13, 11. • Sup. -ώτατος, CIC. Att. 13, 6, 4.

Étym. εὖ, λέγω.

ον, reasonable, sensible, νουθετήματα A. Pers. 830; οὐκ εὐλόγῳ ἔοικεν Pl. R. 605e; εὔ. ὀργή Phld. Ir. p. 45 W. ; εὔλογόν [ἐστι] c. inf., it is reasonable that…, Pl. Cra. 396b, Arist. Pol. 1286b15, etc. ; εὐλογώτερόν [ἐστι] Id. EN 1102b2; Sup., Id. Cael. 286b34.
reasonable, fair, πρόφασις Th. 3.82, D. 18.152, etc. ; τὸ εὔ.
a fair reason, Th. 4.87.
probable, c. dat. et inf., Hp. de Arte 7 (Comp.), cf. Sphaer. Stoic. 1.141, Cic. Att. 14.22.2; διὰ σημείων εὐ. Phld. Lib. p. 30 O. ; ἐκ τῶν εὐ. in all probability, Plb. 10.44.6, cf. Plu. Them. 13; ἐκτὸς τῶν εὐ. πίπτειν to be beyond all probability, Arist. Metaph. 1060a18; Comp., Pl. Ep. 352a; Sup., Cic. Att. 13.6.4. Adv. -γως Phld. Lib. p. 33 O.
suitable, conformable, c. dat., Plot. 6.5.10.
creditable, κατορθώσασι εὔ. [ἐστί] Ar. Ra. 736.
eloquent, v.l. for ἱκανός, LXX Ex. 4.10, whence Ezek. Exag. 113, Ph. 2.93, 1.166 (interpr. as reasonable). Adv. -γως with good reason, reasonably, A. Th. 508, Supp. 47 (lyr.), Fr. 6, Ar. V. 771, Lys. 12.7; εὐ. ἄπρακτοι ἀπίασιν Th. 4.61; εὐ. φέρειν (Abresch εὐλόφως) E. Fr. 175; εὐ. ἔχειν Pl. Phd. 62d; εὐ. φθονεῖν τινι Alex. 219.1; τοῖς εὐ. καὶ τοῖς κακῶς ἔχουσι Men. 48; freq. like εἰκότως, at the close of a sentence, implying assent, Arist. EN 1153b15, 1162b6; Comp. -ωτέρως Isoc. 6.28; -ώτερον Plb. 7.7.7. εὐ. τινὰ ἐπιδέξασθαι (v.l. ἐνδόξως) honourably, LXX 1 Ma. 12.43.

vernünftig, vernunftgemäß ; εὔλογον, sc. ἐστί, mit acc. c. inf., Plat. Crat. 396b ; οὐκ εὐλόγῳ ἔοικε Rep. X.605e ; νουθετήματα Aesch. Pers. 816 ; προφάσεις Thuc. 3.82 ; Dem. 18.151, der 45.14 auch οὔτ' ἐοικότα οὔτ' εὔλογα vrbdt ; εὐλόγοις ἀφορμαῖς χρῆσθαι Pol. 4.4.9, öfter ; τὸ εὔλογον, die Wahrscheinlichkeit, Thuc. 4.87 ; Arist.; ἐκ τῶν εὐλόγων, nach aller Wahrscheinlichkeit, Pol. 10.44.6 ; Plut. Them. 13 u. a.Sp., bes. Ausdruck der Akademiker ; ἐκτὸς τῶν εὐλόγων πίπτειν, unwahrscheinlich sein, Arist. Metaph. 10.2 ; vgl. Pol. 16.12.6.
• Adv., Aesch. Suppl. 47, 249 u. öfter ; Ar. Vesp. 771 u. A.; εὐλόγως ἔχειν, vernünftig, wahrscheinlich sein, Plat. Phaed. 62d u. A.; εὐλογωτέρως, Isocr. 6.28.

1. having good reason, reasonable, sensible , (Aeschulus Tragicus); εὔλογόν [ ἐστι], with infinitive, it is reasonable that , (Aristophanes Comicus)
2. reasonable, fair , (Thucydides), etc.: τὸ εὔλ. a fair reason , (Thucydides)
3. adverb -γως, with good reason, reasonably , (Aeschulus Tragicus); εὐλ. ἔχειν to be reasonable , (Plato Philosophus) (ML)