Democracy never meant "mob rule". Even in Athenian democracy, few things were decided by actual majority rule. Never in history has there been a democracy where pure majority rule was the typical case.

So yes, it is a personal definition. Scholars don't use this definition. Pundits don't use this definition. The common man doesn't use this definition. It's a BS definition, and if it weren't, it would be pointless and redundant because "majority rule" captures this already.