| n. 1.  a.  The ability by which one understands; intelligence: concepts that are beyond the understanding of a child. b.  The quality or condition of one who understands; comprehension: Do you have much understanding of calculus? See Synonyms at  reason. 2.  Individual or specified judgment or outlook; opinion: In my understanding, this is a good plan. 3.  A usually implicit agreement between two or more people or groups: an understanding between neighbors over late-night noise. 4.  A disposition to appreciate or share the feelings and thoughts of others; sympathy: Can't you show some understanding for the poor child? adj.  Characterized by or having good sense or compassion: an understanding teacher. un′der·standing·ly adv. | 
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