c. 1600, "munitions of war" (especially the great guns on board a man-of-war), also "naval force equipped for war" (1690s), from Latin armamentum "implement," from Latin armare "to arm, furnish with weapons" from arma (see arm (n.2)). Meaning "process of equipping for war" is from 1813.
1. The fears have prompted several countries to embark on massive armament plans.
2. The unit has insufficient armament with which to do battle.
3. The high tax policy is certainly unpopular, although it's unlikely to meet the soaring armament expenditures.
4. In 1937 he was seconded to the Royal Canadian Air Force in Ottawa as air armament adviser.
5. The armament of any of the great powers could destroy civilization.