This trilingual glossary provides a comprehensive list of terms used in legislative practice related to market surveillance in English, French, and Russian. Market surveillance policies have a strong impact on business competitiveness, international trade, and economic development. To build an effective market surveillance system requires cooperation among the system stakeholders, both nationally and internationally. For this purpose, a common terminology is a prerequisite. A first multilingual glossary of market surveillance terms was published by the Working Party on Regulatory Cooperation and Standardization Policies (WP.6) in 2011. Since then, there have been new terms and procedures that have come into effect. This revision integrates terms such as 'conformity rate', 'information society service provider', 'online interface', and 'corrective action'. This revision also proposes modification to some terms such as 'market surveillance', 'withdrawal', 'technical regulation', and 'technical specification'.