The criteria for sustainable development have become a decisive factor in the formulation and assessment of economic policy models. By its nature, sustainable development is a multidimensional category; therefore, it requires an interdisciplinary approach. This study is focused on the economic aspects of sustainable development. However, the analysis includes the interdependences of the noneconomic dimensions. The author proposes a new definition for sustainable development that incorporates those dimensions and suggests a new GDP matrix that better integrates the quantitative and the qualitative parameters of the economic output, including its effect on the environmental equilibrium.