demilitarization

verb (used with object), de·mil·i·ta·rized, de·mil·i·ta·riz·ing.

1. to deprive of military character; free from militarism.
2. to place under civil instead of military control.
3. to forbid military use of (a border zone).

verb (tr)

1. to remove any military presence or function in (an area)demilitarized zone
2. to free of military character, purpose, etc11 regiments were demilitarized

v.

1883, in reference to the Austrian military frontier in the Balkans; see de- + military + -ize. Demilitarized zone attested by 1921 (the Versailles Treaty uses neutralized zone).