ulcer /ˈʌlsə/ I. n. [c] 1.（医）溃疡：She had an ulcer in her mouth.她口腔出现溃疡。My father suffered from stomach ulcer for a long time.我父亲患胃溃疡已经很长时间。2. 道德败坏，腐败；弊病：He's a con man with an incurable ulcer called gambling. 他是一个骗子，嗜赌的毛病难改。‖II. vi. & vt. (使)腐败，(使某物)形成溃疡：Aspirin can ulcer the stomach lining.阿司匹林能造成胃壁溃。