promptly adverb Stress: first syllable 🤍 Save Syllables: prompt-ly (2) English Definition Done without delay; immediately. Example Sentence She replied to my letter promptly. US IPA /ˈprɑːmpt.li/ 🔊 Listen US UK IPA /ˈprompt.li/ 🔊 Listen UK Synonyms immediately instantly quickly swiftly Antonyms slowly belatedly tardily Share this Word Facebook WhatsApp X Telegram Copy Link