IPA: /nɒnˌkɒntəmˈpɛrəri/
KK: /nɑnˈkɒntəmpəˌrɛri/
Not belonging to the same time period; not modern or current.
The museum features noncontemporary art that dates back to the 18th century.
Noncontemporary → It is formed from "non-" (meaning not) and "contemporary" (from Latin "contemporarius", where "con-" means together and "tempus" means time). The word "noncontemporary" means not existing or occurring at the same time as something else.
Think of 'not' ('non-') and 'together in time' ('contemporary') to remember that 'noncontemporary' refers to things that do not exist at the same time.