Definition of: tumor

(t′mər, ty′-) noun
1. Pathol. A local swelling on or in any part of the body, especially from some autonomous morbid growth of tissue which may or may not become malignant; a neoplasm.
2. Obs. High-sounding words or style; bombast.
3. Obs. A swelling of any kind, as of water. Also Brit. tu′mour.
—fatty tumor Lipoma. [<OF tumour <L tumor a swelling <tumere swell]
—tu′mor·ous adjective