1. In England, am ecclesiastical dignitary in cathedral and collegiate churches, and the head of a chapter; the second dignitary of a diocese. Ancient deans are elected by the chapter in virtue of a conge d'elire from the king and letters missive of recommendation; but in the chapters founded by Henry VIII., out of the spoils of dissolved monasteries, the deanery is donative, and the installation merely by the kings letters patent.
2. An officer in each college of the universities in England.
3. In the U. States, an officer in a medical school.