IPA: /nɒnˈkæmpəs/
KK: /nɑnˈkæmpəs/
Not related to a school or university campus.
The noncampus events attracted a diverse group of participants.
Noncampus → It is formed from "non-" (meaning not) and "campus" (from Latin, meaning field or open space). The word "noncampus" refers to an area that is not a campus or does not belong to a campus.
Think of 'non-' meaning 'not' and 'campus' meaning 'field' — so noncampus refers to an area that is not a field or space associated with a campus.