thrombosePronunciation: /θrɒmˈbəʊz, -s/Definition of thrombose verb affect with or be affected by thrombosis: [with object]:the superior mesenteric artery was thrombosed [no object]:the adjacent capillaries may thrombose (as adjective thrombosed)the appearance of the thrombosed veinOrigin: late 19th century: back-formation from thrombosis