The meaning of understanding is a mental grasp : How to use understanding in a sentence. Understanding a concept means you get it.
Your understanding might be that your mother will always drive you to school if you miss the bus. See examples of understanding used in a sentence. Both comprehension and understanding can be used to talk about someone's ability to understand something.
If you have an understanding of something, you know how it works or know what it means. Understanding involves the capacity to analyze information, interpret it accurately,. He has a thorough/full understanding of the subject.
She has a basic/better/deep understanding of the process. I hope to get/gain a clearer understanding of the issues involved.