flap noun verb Stress: first syllable 🤍 Save Syllables: flap (1) English Definition Move up and down or back and forth, especially when flying. Example Sentence The bird began to flap its wings. US IPA /flæp/ 🔊 Listen US UK IPA /flæp/ 🔊 Listen UK Synonyms flutter wave beat shake Antonyms still steady remain Share this Word Facebook WhatsApp X Telegram Copy Link