killer noun Stress: first syllable 🤍 Save Syllables: kill-er (2) English Definition A person or thing that kills. Example Sentence The police finally arrested the killer. US IPA /ˈkɪlər/ 🔊 Listen US UK IPA /ˈkɪlə(r)/ 🔊 Listen UK Synonyms murderer assassin slayer homicide Antonyms savior rescuer protector Share this Word Facebook WhatsApp X Telegram Copy Link