I.to make other than it is, to change, alter, Eur., Plat., etc.
II.ἀλλ. τί τινος to give in exchange for, barter one thing for another, Aesch.; τι ἀντί τινος Eur.: so in Mid., Thuc.
III.to take one thing for another, κάκιον τοὐσθλοῦ Theogn.; ἀλλ. θνητὸν εἶδος to assume mortal form, Eur.:—Mid., ἀλλάσσεσθαι τί τινος one thing for another, εὐδαιμονίας Hdt., etc.:—hence, to buy, τι ἀντ᾽ ἀργυρίου Plat.
IV.to interchange, alternate, σκῆπτρ᾽ ἀλλάσσων ἔχειν to enjoy power in turn, Eur.:—Pass., ἀρεταὶ ἀλλασσόμεναι in turns, Pind.