The term is "moulded depth" and can vary.
I've heard it explained a number of ways, but a general definition would be
from the top of the keel to the top of the gunwale at the midship point.
You need to check with the particular surveyor for the boat in question as to
their definition.
Draft, on the other hand is how much water your boat draws at any given time
and can again, vary .... light/loaded, at rest/underway, fwd/aft/midships,
planing/displacement mode, G etc.

Shen