This is the 9217th most frequent Portuguese word.
cantor
Singer.
In this sentence, 'cantor' is again a noun and used in a simile to compare someone's voice to that of a singer.
Ela encantou todos com sua voz, quase como um cantor.
She enchanted everyone with her voice, nearly as a singer.
Here, 'cantor' functions as a noun specifying the role of the individual within the band as the singer.
Eu gostaria de conversar com o cantor da banda depois do concerto.
I would like to talk to the band's singer after the concert.
Here, 'cantor' is used as a noun to refer to someone who sings professionally or performs songs in public.