sustainablePronunciation: /səˈsteɪnəb(ə)l/Translate sustainable | into French | into German | into Italian | into Spanish Definition of sustainable adjective 1able to be maintained at a certain rate or level:sustainable economic growth conserving an ecological balance by avoiding depletion of natural resources:our fundamental commitment to sustainable development 2able to be upheld or defended:sustainable definitions of good educational practiceDerivatives sustainabilityPronunciation: /-ˈbɪlɪti/ noun sustainably adverb sustainable in other Oxford dictionaries Definition of sustainable in the US English dictionary