Meaning of sampling frequency?
Probably no, but... maybe. The classical sampling theorem is often misstated: if a continuous signal is band-limited, it can be recovered exactly (in theory) if the sampling frequency is twice its maximum frequency.
However, there are cases where signals can be recovered above the Nyquist limit, provided that we have more information, because ambiguities may happen  in the recovery:

finite-time signal cannot be strictly band-limited, but processing can afford a small amount of distorsion,
some band-limited signals can be recovered with about twice their bandwidth (and not just twice the max frequency).
there are more generic sampling theorems (like: do you sample the derivative of the signal at the same time), but more involved as well.

Generally, the above possibilities are not implemented in traditional hardware or software.