Definition of "emption"

There is a diſpute among the lawyers, whe ther Glaucus's exchanging the golden armour with the brazen one of Tydides, was emption or commutation.

1727, John Arbuthnot, Tables of ancient coins, weights and measures

After the deperdition of Indagator, having an appetency still further to pervstigate the frithy occident; being still an agamist, and not wishing to be any longer a pedaneous viator, nor to be solivagant, I brought about the emption of a yaud, partly by numismatic mutuation, and partly by a hypothecation of my fusee and argental horologe.

1856, Samuel Klinefelter Hoshour, Letters to Squire Pedant, in the East, page 28