Added 9 October 2026 fussy /ˈfʌ.si/ adjective Categories: Describing WordsRare Words adjective ! Definition from WordNet 3.1, Princeton University. Pronunciation from Wiktionary, via Kaikki.org. More about fussy at Wordnik → Where our words come from → Annoyed and irritable. Overcrowded or cluttered with detail. a busy painting Exacting especially about details. a finicky eater Related Words: finicalfinickyfastidiousfancyparticularbusyill-naturedill-temperedbad-temperedcrabbygrouchygrumpy Back to today's word