This is the 4421st most frequent Portuguese word.
bilionário
"Bilionário" means "billionaire," referring to someone whose wealth is equal to or exceeds one billion units of currency.
The word 'bilionário' here is used as a noun and refers to a person whose net worth is in billions.
Ele é um bilionário que fundou várias empresas de tecnologia.
He is a billionaire who founded several technology companies.
In this sentence, 'bilionário' is used as an adjective, qualifying the noun 'investment' to denote the scale of the funding.
O projeto recebeu um investimento bilionário para ser realizado.
The project received a billion-dollar investment to be carried out.
Here, 'bilionária' is used as a noun in a feminine form referring to a person aspiring to possess wealth in billions.