lock noun verb Stress: first syllable 🤍 Save Syllables: lock (1) English Definition A mechanism for keeping a door, lid, or container fastened. Example Sentence Don't forget to lock the door before leaving. US IPA /lɑːk/ 🔊 Listen US UK IPA /lɒk/ 🔊 Listen UK Synonyms bolt latch fasten secure clasp Antonyms unlock open release Share this Word Facebook WhatsApp X Telegram Copy Link