emp·tion \ˈem(p)shən\noun (-s) Etymology: Latin emption-, emptio, from emptus (past participle of emere to buy) + -ion-, -io -ion — more at redeem 1.: the act of buying : purchase < relieved both of the emption of stuffs and of the payment of tailors and property-makers — E.K.Chambers > 2.: right of emption • emp·tion·al\-shənəl\adjective