1. Intended or appropriate for defending; protective. 2. a defensive weapons system; defensive behavior. 3. Of or relating to the effort to prevent an opponent from gaining points in a game or an athletic contest. 4. Of or relating to defense. 5. Constantly protecting oneself from criticism, exposure of one's shortcomings, or other real or perceived threats to the ego. 6. A means of defense. 7. An attitude or position of defense. 8. Prepared to withstand or counter aggression or attack.
