This is the 11433rd most frequent Portuguese word.
noutros
"In others" (used to refer to other people, places, or things).
In this sentence, 'noutros' means 'in other [places or cabinets]', referencing other locations than the current one.
Eu não consegui encontrar o livro neste armário, talvez esteja noutros.
I couldn't find the book in this cabinet, maybe it's in others.
Here, 'noutros' is used to mean 'in other [rooms]', specifically referring to different rooms within the same house.
Você viu o livro noutros quartos da casa?
Did you see the book in other rooms of the house?
In this sentence, 'noutros' signifies 'in other [books]', indicating additional books apart from the current one.