This is the 45th most frequent Portuguese word.
segundo
"Segundo" in Portuguese means "second" in English.
In this sentence, 'segundo' is used as a preposition meaning 'according to', introducing a source of information or opinion.
Segundo a professora, teremos prova amanhã.
According to the teacher, we will have a test tomorrow.
In this example, 'segundo' is part of an expression indicating rank or sequence in a competitive situation.
Resolvi o problema em segundo lugar.
I solved the problem in second place.
Here, 'segundo' is used as an ordinal adjective to describe the numerical position in a sequence.