Knowledge about a subject, situation, etc. Both comprehension and understanding can be used to talk about someone's ability to understand something. The meaning of understanding is a mental grasp :
New TA opens in Texas with 90 truck parking spaces
Comprehension usually used with of. Your understanding might be that your mother will always drive you to school if you miss the bus. He noted bond's apparent lack of.
Understanding a concept means you get it.
How to use understanding in a sentence. Or about how something works: Understanding implies abilities and dispositions with respect to an object. Understanding is a relation between the knower and an object of understanding.
