IPA: //nɒnˈsɪtɪzən//
KK: /nɑnˈsɪtɪzən/
A person who is not a citizen of the country they are in, often having limited rights compared to citizens.
Many noncitizens live and work in the country but do not have the same legal rights as citizens.
Noncitizen → It is formed from "non-" (meaning not) and "citizen" (from Old French *citizien*, meaning a member of a city or state). The word "noncitizen" refers to someone who is not a member of a city or state, lacking the rights and privileges of citizenship.
Think of 'non-' meaning 'not' and 'citizen' as a member of a community — a noncitizen is someone who is not a member of that community.