In a language like C, the actual function is known.

Utility programs such as or carry out actual functions.

The actual function of kallidin in the body is as yet uncertain.

The process of turning those references into actual functions is called linking.

The actual original function of the Shirvanshah complex is still under investigation.

There is still very little known about the actual function of the claustrum.

His actual function, however, was collecting intelligence in southern Russia.

My system doesn't change the actual function of the machine.

The internal details of these definitions have nothing to do with their actual mathematical function.

In a given expression, the actual function referenced is determined by the context.