This is the 95th most frequent Portuguese word.
sexta
"sexta" means "Friday."
Here, 'sexta' represents 'sexta-feira', which means 'Friday', indicating the day of the week.
Na sexta, temos um encontro marcado.
On Friday, we have a scheduled meeting.
In this case, 'sexta' is used as an ordinal number, meaning 'sixth' when referring to a feminine noun.
Ela terminou a corrida em sexta posição.
She finished the race in sixth place.
Here, 'sexta' is also an ordinal number, meaning 'sixth', and it matches the gender of 'aula', which is feminine.