Definition of "Understanding" :

noun: the capacity for rational thought or inference or discrimination

noun: the cognitive condition of someone who understands

"He has virtually no understanding of social cause and effect."

noun: an inclination to support or be loyal to or to agree with an opinion

"I knew I could count on his understanding."

noun: the statement (oral or written) of an exchange of promises

"There was an understanding between management and the workers."

adjective: characterized by understanding based on comprehension and discernment and empathy

"An understanding friend."