The OPD Third Canadian Edition is an illustrated, theme-based dictionary for second-language learners. This four-colour dictionary defines words through pictures, and presents each new word in context. This new edition is a revision which updates and refreshes some existing content, adds new content, and makes some improvements based on market research and what users like most in the competition. The OPD is designed for use both in and out of the classroom. Speaking exercises are presented throughout the OPD to allow students to practise new vocabulary in pairs or small groups, while the pronunciation guide in the index allows students to check their pronunciation when they are studying on their own.