The Oxford Picture Dictionary, Second 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. The OPD, along with its workbooks and many other components, can be used as a reference book or as text for high school or adult ESL students at the beginner level. For years, the first Canadian edition of the OPD has been the industry leader among pict