Etymology From Middle English den, deen (“dean”), from Anglo-Norman deen and continental Old French deien (modern French doyen), from Latin decānus. Doublet of doyen.
1
A senior official in a college or university, who may be in charge of a division or faculty (for example, the dean of science) or have some other advisory or disciplinary function (for example, the dean of students).
Lucretius versus the Lake Poets ' Nature I loved ; and next to Nature , Art . ' Dean , adult education may seem silly . What of it though ? I got some willy - nilly The other evening at your college deanery . And grateful for it ( Let's not be facetious!)[…]1995 October 23, Robert Frost, Richard Poirier, Robert Frost: Collected Poems, Prose, & Plays (LOA #81) (DE-601)374069697: Library of America series), Library of America, →ISBN, →LCCN, →OCLC, page 357:
2
A dignitary or presiding officer in certain church bodies, especially an ecclesiastical dignitary, subordinate to a bishop, in charge of a chapter of canons.
3
The senior member of some group of people.
dean of the diplomatic corps - a country's most senior ambassador
dean of the House - the longest-serving member of a legislature
1 more example
All of the switchboard operators had been parties to it, including Marie Willis. Their dean, Alice Hart, collected[…]1955 October 19, Rex Stout, The Next Witness, Three Witnesses, 94 Bantam, →ISBN, page 67:
Etymology From Middle English den, deen (“dean”), from Anglo-Norman deen and continental Old French deien (modern French doyen), from Latin decānus. Doublet of doyen.