Definify.com
Webster 1913 Edition
Preceptor
1.
One who gives commands, or makes rules; specifically, the master or principal of a school; a teacher; an instructor.
2.
The head of a preceptory among the Knights Templars.
Sir W. Scott.
Webster 1828 Edition
Preceptor
PRECEP'TOR
,Noun.
1.
In a general sense, a teacher; an instructor.2.
In a restricted sense, the teacher of a school; sometimes, the principal teacher of an academy or other seminary.