IPA: //nɒnˈfɪkʃənl//
KK: /nɑnˈfɪkʃənl/
Describing something that is based on real events or facts, rather than being made up or imagined.
The book is a nonfictional account of the author's experiences during the war.
Nonfictional → It is formed from "non-" (meaning not) and "fiction" (from Latin *fictio*, meaning the act of making or shaping). The word "nonfictional" refers to works that are not made up, but rather based on real events or facts.
Think of 'non-' meaning 'not' and 'fiction' meaning 'the act of making up stories' — so nonfictional describes something that is not made up, but based on reality.