Defensive (Adjective) — Intended or appropriate for defending against or deterring aggression or attack. ex. "defensive weapons" ex. "a defensive stance"
Defensive (Adjective) — Attempting to justify or defend in speech or writing.
Defensive (Adjective) — Sensitive to criticism, trying to avoid or challenge any criticism.
Defensive (Noun) — An attitude of defensiveness (especially in the phrase 'on the defensive').