IPA: /nɒnˈfæmɪli/
KK: /nɑnˈfæmɪli/
Not belonging to or related by blood or marriage to a particular family.
She felt like a nonfamily member at the reunion.
A group of people who are not related by blood or marriage, often living together or having a close relationship.
In the community, many nonfamily members joined the celebration.
Nonfamily → It is formed from "non-" (meaning not) and "family" (from Latin "familia", meaning household or family). The word "nonfamily" refers to something that is not part of a family or household.
Think of 'non-' meaning 'not' and 'family' referring to a household — so 'nonfamily' means not part of a household.