Canadian Security Intelligence Service
noun /kəˌneɪdiən sɪˌkjʊərəti ɪnˈtelɪdʒəns sɜːvɪs/
/kəˌneɪdiən sɪˌkjʊrəti ɪnˈtelɪdʒəns sɜːrvɪs/
[singular] (abbreviation CSIS)
- a service of the Canadian government that investigates terrorism and similar threats to Canadian society