I looked up the meaning of functional in dictionaries, and it seems like there are no examples of it being used to mean that something has functions. Because of that, I needed to ask you if functional can be used to mean that something has functions.
For example, can I say,
The foreskin is a functional part of your body
The foreskin is functional
to mean that the foreskin has functions? I am a person against circumcision. I use the word functional to describe the foreskin. I wonder if it is correct to use that adjective that way.