Definitions
1.noun(gerund) The act of one that understands or comprehends; comprehension; knowledge; discernment.
2.nounReason or intelligence, ability to grasp the full meaning of knowledge, ability to infer.
3.nounOpinion, judgement or outlook."According to my understanding, the situation is quite perilous. I wonder if you see it this way, too."
4.nounAn agreement of minds; harmony; something mutually understood or agreed upon.
5.nounSympathy."He showed much understanding for my problems when he heard about my past."