IPA: /nɒnprəˈfɛʃənl/
KK: /nɑnprəˈfɛʃənl/
A person who does not have professional training or qualifications in a particular field.
As a nonprofessional, she enjoyed painting as a hobby rather than a career.
Nonprofessional → It is formed from "non-" (meaning not) and "professional" (from Latin "professio" meaning a declaration or public acknowledgment of a profession). The word "nonprofessional" means not relating to or characteristic of a profession, or someone who is not a trained or qualified professional.
Think of 'non-' meaning 'not' and 'professional' referring to someone who is trained in a field. This helps you remember that 'nonprofessional' describes someone who is not trained or qualified in a profession.