1. One who preaches; one who discourses publicly on religious subjects. How shall they hear without a preacher? (Rom. X. 14)
2. One who inculcates anything with earnestness. ”No preacher is listened to but time.
(Science: zoology)” (swift) Preacher bird, a toucan.
Origin: Cf. OF. Preeschierre, prescheur, F. Precheur, L. Praedicator.