A lecturer, a tutor, especially in a college or university.
In Oxford and some Cambridge colleges: a tutorial fellow or reader in a particular subject (in Oxford formerly interchangeable with professor as applied to all except the Regius Professors); (also in Cambridge) the college officer who attends to the matriculation and graduation of members of a college..
Origin
Late 16th century; earliest use found in John Ferne (c1560–1609), administrator and writer on heraldry. From classical Latin praelector person who reads an author to others and adds explanations, in post-classical Latin also lecturer at a university from praelect-, past participial stem of praelegere + -or.