Wordnet 3.0
NOUN (1)
1. 
 (military) military action or resources protecting a country against potential enemies; 
- Example: "they died in the defense of Stalingrad"- Example: "they were developed for the defense program"[syn: defense, defence, defensive measure]
WordNet (r) 3.0 (2006):
defensive measure
    n 1: (military) military action or resources protecting a
         country against potential enemies; "they died in the
         defense of Stalingrad"; "they were developed for the
         defense program" [syn: defense, defence, defensive
         measure]