MORAL, adj.
Conforming to a local and mutable standard of right. Having the quality of general expediency.
It is sayd there be a raunge of mountaynes in the Easte, on one syde of the which certayn conducts are immorall, yet on the other syde they are holden in good esteeme; wherebye the mountayneer is much conveenyenced, for it is given to him to goe downe eyther way and act as it shall suite his moode, withouten offence.
_Gooke's Meditations_
--Ambrose Bierce - The Devil's Dictionary