Top Definition
1. Verb: To upgrade, strengthen, install, or add to existing protection against weapons (usually metal plates) on the human body, military vehicle or aircraft or ships, or to fortifications.

2. Noun: The upgraded armor installed on people, vehicles, or locations.

Originating in American military parlance, especially during the Iraq War, and shortened from "upgrading armor."
1. Soldiers were digging through local landfills for pieces of scrap metal and compromised ballistic glass to up-armor their vehicles.

2. In response to the vulnerability of HMMWVs (Humvees) operating in Iraq, Up-Armor Kits were designed and installed on M998 HMMWVs. But no matter how much up-armor the sluggish humvees packed on, the best hope to putting an end to the violence was to prevent it from happening in the first place.

by Richard Allan Cooper April 04, 2008

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