1.the cognitive condition of someone who understands;
he has virtually no understanding of social cause and effect
2.the statement (oral or written) of an exchange of promises;
they had an agreement that they would not interfere in each other's business
3.an inclination to support or be loyal to or to agree with an opinion;
his sympathies were always with the underdog
4.the capacity for rational thought or inference or discrimination;
we are told that man is endowed with reason and capable of distinguishing good from evil
5.characterized by understanding based on comprehension and discernment and empathy;
an understanding friend