So, either a vote passes unanimously or it doesn't pass at all? In all cases (of the scenarios you're describing). That doesn't make a lot of sense to me, even

So, either a vote passes unanimously or it doesn't pass at all? In all cases (of the scenarios you're describing). That doesn't make a lot of sense to me, even as terminology specific to corporate governance. The word 'unanimous' is completely superfluous in that context, and words are not usually defined in ways where they have superfluous meanings.