From Middle English cognicion, from Latin cognitio (“knowledge, perception, a judicial examination, trial”), from cognitus, past participle of cognoscere (“to know”), from co- (“together”) + *gnoscere, older form of noscere (“to know”); see know, and compare cognize, cognizance, cognizor, cognosce, connoisseur.
- cognition in Webster’s Revised Unabridged Dictionary, G. & C. Merriam, 1913
- cognition in The Century Dictionary, The Century Co., New York, 1911
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