What does the charge capacity mean after battery test?

I did a battery test on my notebook. As shown in the appendix there's 86% charge capacity. Does that mean that the battery is no longer charged to 100% but only up to 86%?

Yes that is so.

Or wear level of 14% when it runs stupid.

Hm, not quite. The battery will continue to charge to 100% of its current capacity, ie 4.2V -4.3V. Only 100% today are only 86% of what the battery according to description times had.

Like a bucket in which you carry concrete. If he had a content of 15 liters can fill it even after prolonged use to 100%, but there are only 13 liters of fresh concrete space