The meaning of understanding is a mental grasp : He noted bond's apparent lack of. Comprehension usually used with of.
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Or about how something works: Understanding is a relation between the knower and an object of understanding. Both comprehension and understanding can be used to talk about someone's ability to understand something.
Mental process of a person who comprehends;
Understanding implies abilities and dispositions with respect to an object. How to use understanding in a sentence. Knowledge about a subject, situation, etc.