IPA: /nɒnˈbɪliːf/
KK: /nɑnˈbɪlif/
The state of not believing in something, especially in a religious context.
His nonbelief in any deity made him feel different from his friends.
Nonbelief → It is formed from "non-" (meaning not) and "belief" (from Old English "geleafa", meaning faith or trust). The word "nonbelief" means the absence of belief or faith.
Think of 'not' ('non-') having 'faith' ('belief') — that's why nonbelief means not having faith.