armor

noun

ar·​mor ˈär-mər 

1

: defensive covering for the body

especially : covering (as of metal) used in combat

2

: a quality or circumstance that affords protection

the armor of prosperity

3

: a protective outer layer (as of a ship, a plant or animal, or a cable)

4

: armored forces and vehicles (such as tanks)

armor transitive verb

armorless

ˈär-mər-ləs 

adjective

Illustration of armor

• 1 helmet
• 2 gorget
• 3 shoulder piece
• 4 pallette
• 5 breastplate
• 6 brassard
• 7 elbow piece
• 8 skirt of tasses
• 9 tuille
• 10 gauntlet
• 11 cuisse
• 12 knee piece
• 13 jambeau
• 14 solleret

Synonyms of armor

• ammunition
• defense
• shield
• protection
• weapon
• safeguard
• wall

Examples of armor in a Sentence

The officers are required to wear bulletproof body armor.

The shots penetrated the tank's armor.

The armadillo's armor consists of a series of small, bony plates.

a weapon designed for use against enemy armor

Recent Examples on the Web

Mopar, Stellantis' parts and service division, is leading off its holiday gift ideas guide with something to help the Wrangler lover in your life show off a little holiday spirit in the form of the Jeep Wrangler Ugly Sweater trail armor. —Eric D. Lawrence, USA Today, 14 Dec. 2025

Its slow slog across the Ukrainian countryside, using its significant advantage in troop numbers in a corrosive war of attrition, has been costly in terms of casualties and losses of armor. —Arkansas Online, 13 Dec. 2025

André called his wardrobe his armor, his tabernacle and his sanctuary. —Fairchild Studio, Footwear News, 13 Dec. 2025

Mopar, Stellantis' parts and service division, is leading off its holiday gift ideas guide with something to help the Wrangler lover in your life show off a little holiday spirit in the form of the Jeep Wrangler Ugly Sweater trail armor. —Eric D. Lawrence, Freep.com, 12 Dec. 2025

Word History

Etymology

Middle English armure, armoure "arms, body armor," borrowed from Anglo-French & continental Old French, going back to Latin armātūra "armament, troop" (Medieval Latin, "suit of armor") — more at armature

First Known Use

14th century, in the meaning defined at sense 1

Phrases Containing armor

• anti-armor
• armor-plated
• knight in shining armor
• scale armor

Rhymes for armor

• charmer
• harmer

Kids Definition

armor

noun

ar·​mor ˈär-mər 

1

: a covering (as of metal) to protect the body in battle

2

: a protective covering (as the steel sides of a battleship or the covering of an animal or plant)

3

: armored forces and vehicles (as tanks)