It's beyond that. For instance, when someone is enlightened in relationships, they make each next decision because it is the right one. They know it is the right one, and they trust in that knowledge. They know even when the outcome shouldn't actually be knowable. They can't always define why they know, or even what it is they know. But they do know. When something in that area of life isn't working, they aren't frustrated by it, because even then they know the right next step. Even if that step is a painful one, they take it without fear and without hesitation because it is simply the right next step. They enjoy their relationships (even those with folks who aren't good at relationships and who are being difficult). They are never unsure of themselves in that area. I'm unsure whether enlightenment can be lost, or if those who seem to have had it and lost it were close, but never quite made it.
See how poorly this comes into words? It sounds clinical and emotionless at times, but it's not.
Here's the comparison to competence. If someone is highly competent at something, they will make mistakes, and will be able to fix them. They sometimes get frustrated by what isn't working. They understand the topic of their expertise. They do "get it", but mostly on an intellectual level.
You might find some fluidity in my attempts to explain the idea that's in my mind as I try to put it into words that both explain what I mean and make sense to you. That likely either means I'm more enlightened, or that I have a very weak idea of what it is. I tend to think it's the latter.