What do they mean when they say “academic integrity”?

"Academic integrity" is the term for a set of principles and rules covering everything from using footnotes properly and citing your research sources, to cheating on exams, buying essays, etc. You can find the formal rules and the penalties in the Code of Behaviour on Academic Matters. But you’ll find a short, useful introduction on the Faculty web site, and a more exhaustive treatment on the Faculty's Office of Student Academic Integrity web site.