cobalt noun Stress: first syllable 🤍 Save Syllables: co-balt (2) English Definition A chemical element (Co) or a deep blue pigment made from it. Example Sentence This glass is colored blue with cobalt. US IPA /ˈkoʊbɔːlt/ 🔊 Listen US UK IPA /ˈkəʊbɔːlt/ 🔊 Listen UK Synonyms metal element deep blue pigment Antonyms white colorless Share this Word Facebook WhatsApp X Telegram Copy Link