arc noun verb Stress: first syllable 🤍 Save Syllables: arc (1) English Definition A part of the circumference of a circle or other curve. Example Sentence The rainbow forms a beautiful arc in the sky. US IPA /ɑːrk/ 🔊 Listen US UK IPA /ɑːk/ 🔊 Listen UK Synonyms curve bow arch crescent bend Antonyms straight line line Share this Word Facebook WhatsApp X Telegram Copy Link