Counselling psychology, established in 1987 as a specialization within Canadian professional psychology, has developed a distinctive identity and specific underlying approach to training and practice. To date, the field in Canada has evolved without benefit of a formal definition of the specialization. Over three years, a task force charged with development of a definition of Canadian counselling psychology engaged in a broad survey of extant literature and member consultation, and proposed a definition that was adopted by the Board of Directors of the Canadian Psychological Association in June 2009. The present work discusses the process that informed development of the definition, provides a description of the characteristics of a Canadian counselling psychology approach to research and practice, and enumerates challenges to the continued development of the specialization.