1. A broad piece of armor made of rigid material and strapped to the arm or carried in the hand for protection against hurled or thrusted weapons. 2. A person or thing that provides protection. 3. A protective device or structure, as: 4. A steel sheet attached to an artillery piece to protect gunners from small-arms fire and shrapnel. 5. A wall or housing of concrete or lead built around a nuclear reactor to prevent the escape of radiation. 6. A structure or arrangement of metal plates or mesh designed to protect a piece of electronic equipment from electrostatic or magnetic interference. 7. A pad worn, as at the armpits, to protect a garment from perspiration. 8. A protective plate or similar hard outer covering; a scute or scutellum. 9. Something that resembles a shield, as: 10. An escutcheon. 11. A decorative emblem that often serves to identify an organization or a government. 12. A police officer's badge. 13. the Canadian Shield. 14. defend 15. To cover up; conceal. 16. To act or serve as a shield or safeguard.
