Added 9 October 2026 reasoning /ˈɹiːzənɪŋ/ noun Categories: Mind & IdeasEveryday Words In Latin: ratiocinatio Wiktionary noun ! Definition from WordNet 3.1, Princeton University. Pronunciation from Wiktionary, via Kaikki.org. More about reasoning at Wordnik → Where our words come from → Thinking that is coherent and logical. adjective Endowed with the capacity to reason. Related Words: rationalthinkingintelligentlogicargumentationlogicalthoughtinferenceinferargument Back to today's word