a pri·o·ri 
/ˌɑ:priˈori/ adjective
/ˌɑ:priˈori/ adjective formal : relating to what can be known through an understanding of how certain things work rather than by observation
▪ There's no a priori reason to think your expenses will remain the same in a new city. — compare a posteriori
▪ There's no a priori reason to think your expenses will remain the same in a new city. — compare a posteriori
— a priori adverb
