1) ADJ Something that is Portuguese belongs or relates to Portugal, or its people, language, or culture.

...a former Portuguese colony.

...a Portuguese woman.

...the Portuguese Grand Prix.

2) N-PLURAL: the N The Portuguese are the people of Portugal.

...a former palace built by the Portuguese.

3) N-UNCOUNT Portuguese is the language spoken in Portugal, Brazil, Angola, and Mozambique.

If you are intent on learning to speak Portuguese, there is no better place.

...the leading news agency in the Spanish and Portuguese-speaking world.

English dictionary. 2008.