As for the definitions, hopefully everyone can see -clearly- that the first definition can yield wrong opinions.
The second definition, however close or not to the first one it might be, is a little trickier, but again, a personal view or appraisal can deal with both subjective or objective matters.
Thing about opinions is that often they deal with value. Something is usually "better" or "worse", or just plain "good" or "bad". And often it's difficult (even impossible) to be objective about value judgments until the parameters are clearly set. But of course it's possible.