Merriam-Webster Collegiate Dictionary - directive

 I. adjective  Date: 15th century  1. serving or intended to guide, govern, or influence  2. serving to point direction; specifically directional 1b  3. of or relating to psychotherapy or counseling in which the counselor introduces information, content, or attitudes not previously expressed by the client  II. noun  Date: 1902 something that serves to direct, guide, and usually impel toward an action or goal; especially an authoritative instrument issued by a high-level body or official