The truth is that even with a strict definition, it is subject to change. The meaning of a word or term today may not be the same tomorrow, languages evolve wi

The truth is that even with a strict definition, it is subject to change. The meaning of a word or term today may not be the same tomorrow, languages evolve with the way people communicate, not with the way they get defined. 0-day is a good example, because people outside the security field only care about whether they're vulnerable or not, not about the intricacies of the term.