The document contains a set of definitions that has been put together taking into consideration different sources of RRBM glossary (UNDG, UNDP, OECD), including UN Environments own practice (RBM training material, Programme Manual and Evaluation Unit glossary). This work has been produced collaboratively by Programme Coherence and Assurance Unit, Programme Support Unit in Ecosystems Division and the Evaluation Office and inputs from colleagues of Policy & Programme Division.