Blotting out, especially by filling of a natural space or lumen by fibrosis or inflammation. In radiology, disappearance of the contour of an organ when the adjacent tissue has the same x-ray absorption. See silhouette sign of Felson. [L. oblittero, to blot out]
- osteoplastic o. of the frontal sinus operation to remove the diseased contents, including the mucous membrane, of the frontal sinus and to obliterate the sinus with a free fat graft without altering the external contour of the sinus.
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oblit·er·a·tion (ob-lit″ər-aґshən) [L. obliteratio] complete removal, whether by disease, degeneration, surgical procedure, irradiation, or otherwise.Medical dictionary. 2011.