A "college lecture" refers to a talk or presentation given by a professor or expert at a higher education institution, where they teach and explain a specific topic to a group of students. Full definition
In 6th grade, students have an authentic learning experience on a college campus, which involves participating in their 6th grade coursework in college lecture halls and classrooms. (excelacademy.org)
Also, they may have other duties to fulfill, attending college lectures, preparing for tests or examinations, social gatherings, and other reasons. (studentsassignmenthelp.com)
In the first of six Gresham College lectures on family law, Divorce Law: A Disaster? (newlawjournal.co.uk)