unˈgrantable,a. (un-1 7 b.) 1784R. Bage Barham Downs II. 258 ‘You shall be allowed to give and grant it, out of your own free will.’.. ‘Ungrantable,’ says Sir George.1794Ld. Macartney Wks. (1807) II. 326 A court artifice to elude an ungrantable demand.