What is the meaning of Porque?

because (by or for the cause that; on this account that; for the reason that)

because

why

because (introduces a reason for that described in the previous clause)

because (introduces an explanation to a claim in the previous clause)

European Portuguese standard spelling of por que

 Pre-reform spelling (used until 1943) of por que; now a common misspelling.

because

Source: wiktionary.org