This Glossary explains the key elements required to classify corruption as a criminal act, according to three major international conventions: (1) the OECD Convention on Combating Bribery of Foreign Public Officials in International Business Transactions; (2) the Council of Europe's Criminal Law Convention on Corruption; and (3) the United Nation's Convention against Corruption. The specific purpose of this Glossary is to assist the countries of the OECD Anti-Corruption Network for Eastern Europe and Central Asia in their efforts to reform national anti-corruption criminal legislation according to the requirements of the above-mentioned conventions. The Glossary examines and elaborates on the requirements of the conventions and explains how they can be effectively introduced into the national legislation. The Glossary is also a practical tool for monitoring country compliance with the international anti-corruption conventions, as well as raising awareness of these conventions among experts in the region.Finally, this Glossary will be an important guide for legislators and policy makers in all countries committed to ensuring their anti-corruption legislation meets international standards. Even if a country is not a party to a particular anti-corruption convention, it might desire to comply with the standards of that convention to support the global fight against corruption and to assure foreign investors of a business environment that includes effective anti-corruption laws.