Definition of de facto:
(adj) :
Actual;
Virtual, being such in effect or essence (rather than literally in fact) though not formally or wholly taken for granted, as opposed to
de jure
"although the United States currently has no official language, it is largely monolingual with English being the de facto national language."
(v) :
in reality
(n) :
a legally undeclared spouse. Usually spelled
defacto