[f. COGNIZE v. + -ER. Cf. COGNIZOR, and CONNOISSEUR, for other types.] One who or that which cognizes.
1836. Blackw. Mag., XL. Aug., 255/2. Intellect is the cognizer of all forms.
1877. Blackie, Wise Men, Ep. Ded. p. xii. That formative plastic unity of an inherent λόγος, without which neither a cogniser nor a cognised in any world is possible.