This is the 9100th most frequent Portuguese word.
bibliotecas
Libraries.
Here, 'bibliotecas' refers to physical places where collections of books and other media are stored and accessed by the public, institutions, or community.
Eu frequento muitas bibliotecas na cidade.
I frequent many libraries in the city.
In this context, 'bibliotecas' represents the concept of libraries as a whole, emphasizing their role and purpose in society as preservers of information.
As bibliotecas são depositárias do conhecimento humano.
Libraries are repositories of human knowledge.
This usage of 'bibliotecas' is specific to the specialized facilities that are a part of a larger network, servicing a particular community such as a university.