Can a Definition Violate One of the Rules and Still

Can a definition violate one of the rules and still be meaningful?

A) No, since a violation of the rules would make the definition self-contradictory.
B) No, since a violation of the rules would reduce the definition to complete nonsense.
C) Yes, but only when the problem is that the definition is too narrow or too broad.
D) Yes, because it might still contain helpful information about the concept.
E) Yes, but only when the problem is that the definition lacks a genus.