IPA: /nɒnˈpʌblɪk/
KK: /nɑnˈpʌblɪk/
Something that is not open to the public and is kept private.
The meeting was nonpublic, so only invited guests could attend.
Nonpublic → It is formed from "non-" (meaning not) and "public" (from Latin "publicus", meaning of the people or community). The word "nonpublic" means not open or accessible to the general public.
Think of 'not' ('non-') being combined with 'of the people' ('public') to remember that 'nonpublic' refers to something that is not accessible to everyone.