flex noun verb Stress: first syllable 🤍 Save Syllables: flex (1) English Definition Bend a limb or joint, or contract a muscle Example Sentence He flexed his muscles in front of the mirror. US IPA /fleks/ 🔊 Listen US UK IPA /fleks/ 🔊 Listen UK Synonyms bend tighten contract stretch Antonyms extend straighten Share this Word Facebook WhatsApp X Telegram Copy Link