From Japanese-German FreeDict Dictionary ver. 0.2.0:
論 /(en)tʃˈaɪniːz(ja)lˈe̞tə/, ろん /ɽˈo̞ɴ/
(noun (common) (futsuumeishi))
(noun, used as a suffix)
(1) (n) Argument, (f) Beweisführung, (f) Argumentation, (f) Diskussion, (f) Erörterung, (f) Debatte, (m) Disput, (f) Bemerkung, (2) (f) Abhandlung, (f) Dissertation, (m) Essay, (3) (f) Meinung, (f) Ansicht, (4) (f) Frage, (n) Problem