Pronunciation IPA (key): /ˈkɔːʃəs/ Audio (US)(file) Adjective Positive cautious Comparative more cautious Superlative most cautious Someone who is cautious is careful, uses or exercises caution, and is tentative. Synonyms: alert and careful Antonyms: neglecting and careless He took a few cautious steps out the door when he heard the sirens.Wikiwand - on Seamless Wikipedia browsing. On steroids.Remove ads