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From The Collaborative International Dictionary of English v.0.48:
Cognition \Cog*ni"tion\, n. [L. cognitio, fr. cognoscere, cognitum, to become acquainted with, to know; co- + noscere, gnoscere, to get a knowledge of. See Know, v. t.] 1. The act of knowing; knowledge; perception. [1913 Webster] I will not be myself nor have cognation Of what I feel: I am all patience. --Shak. [1913 Webster] 2. That which is known. [1913 Webster]