Liddell–Scott–Jones: ἀλλαγ-ή

ἀλλαγ-ή [ᾰγ] , ἡ(ἀλλάσσω)

A. change, A. Ag. 482 , etc.; ἀλλαγᾷ βίου

S. OT 1206

;η κäτὰ τόπον ἀ. Arist. Spir. 485a22 ; ἀ. θεῶν

Plu. 2.166d

.

II. exchange, barter, buying and selling, Pl. R. 371b , Arist. EN 1133a19 , Pol. 1257a13 ; pl.,διὰ τὰς ἀ.for purposes of exchange, ib. 1280a35 .

2. agio, whether premium or discount, Peripl.M.Rubr. 49 , PEleph. 14.10

(iii B. C.), PTeb 99.2

(ii B. C.), BGU 1194.17

(i B. C.), etc.

III. later,change of post-horses, stage, Eust. 531.21 , cf. POxy. 1863.5 , etc.