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)