This is the 6471st most frequent Portuguese word.
eua
"EUA" stands for "Estados Unidos da América," meaning "United States of America."
In this sentence, 'EUA' is an acronym commonly used in Portuguese to refer to the United States of America.
Os EUA têm uma economia desenvolvida.
The USA has a developed economy.
Here, 'EUA' serves the same function as above, referring to the United States.
Eu estava em um debate sobre os EUA.
I was in a debate about the USA.
In this example, 'EUA' is used in apposition to clarify or specify the entity being discussed.