demanding UK /dɪˈmɑːndɪŋ/US /dəˈmændɪŋ/adjective 2noun 1forms 3 adjective2 •hard to do, because it takes great effort and the will to keep going for a long timeThis bike is built to withstand even the most demanding terrain. •Making great demands in terms of quality, quantity, accuracy or other criteria; difficult to satisfy.Our wines will satisfy even the most demanding of connoisseurs. noun1 •The act of making a demand.She had had enough whimperings and demandings this morning to last her a week, and her face hardened as a tear rolled down Sarah's cheek. — 2012 formsdemandings · more demanding · most demanding