A teacher or instructor of children; one whose occupation is to teach the young.
A pedant; one who by teaching has become overly formal or pedantic in his or her ways; one who has the manner of a teacher.
A slave who led the master's children to school, and had the charge of them generally.
To teach.
A master or teacher in the context of martial arts, especially kung fu and tai chi.
A spiritual father in esoteric contexts.