What is "unilluminating"

Usage examples of "unilluminating".

I read the short, unilluminating paragraph through several times before something which could hardly be called an idea, more a vague hint of the possibility of some future thought, floated into my mind.

It gave her an unilluminating view of the parking lot, where her worn old car crouched over its rust, waiting for the day when its welds would fail and it could finally slump into scrap.

He emitted a few grunts and made a few unilluminating remarks, and hung up and returned to his chair.

To those who have not had the experience a verbal description would doubtless be unilluminating, if not unintelligible.