Noah Webster's New International Dictionary of the English Language
1. (p. pr. & vb. n.) of Understand.
2. (a.) Knowing; intelligent; skillful; as, he is an understanding man.
3. (n.) The act of one who understands a thing, in any sense of the verb; knowledge; discernment; comprehension; interpretation; explanation.
4. (n.) An agreement of opinion or feeling; adjustment of differences; harmony; anything mutually understood or agreed upon; as, to come to an understanding with another.
5. (n.) The power to understand; the intellectual faculty; the intelligence; the rational powers collectively conceived an designated; the higher capacities of the intellect; the power to distinguish truth from falsehood, and to adapt means to ends.
6. (n.) Specifically, the discursive faculty; the faculty of knowing by the medium or use of general conceptions or relations. In this sense it is contrasted with, and distinguished from, the reason.