tumor noun Stress: first syllable 🤍 Save Syllables: tu-mor (2) English Definition A swelling of a part of the body, caused by an abnormal growth of tissue. Example Sentence The doctor found a tumor in his brain. US IPA /ˈtuːmər/ 🔊 Listen US UK IPA /tjuːmə(r)/ 🔊 Listen UK Synonyms growth swelling lump neoplasm Share this Word Facebook WhatsApp X Telegram Copy Link