Dib-u-nooleyntu waa qof u ololeeya ama hoggaamiya dhaqdhaqaaq doonaya inuu dib u soo nooleeyo ama dib u cusboonaysiiyo xiisaha caqiido, sabab, ama hawl gaar ah, oo inta badan leh macne diimeed ama mid ruuxeed. Erayga waxaa inta badan loo adeegsadaa shaqsiyaadka ama kooxaha ka shaqeeya dib u soo nooleynta ama dib u cusboonaysiinta xiisaha dhaqan ama caadooyin taariikheed ama caqiidooyin, ama kuwa doonaya inay dhiirigeliyaan ama u beddelaan kuwa kale caqiido ama fikrad gaar ah.