can mean:
Protective device:
- Shield , a hand-held protective device, meant to intercept attacks
- Shield (electronics) , reduces electromagnetic coupling
- Shield (heraldry) , the principal portion of a coat of arms
- Shield (geology) , a Precambrian rock mass at the centre of a continent
- Deflector Shield , a protective energy field
- Heat Shield , protects a spacecraft or ballistic missile
- Radiation Shield , protects from ionizing radiation
- Cold Shield , used to protect from radiative heating
- Shielding Effect , in chemistry, is a reduction in the effective nuclear charge
- Tunnelling Shield , used in excavation through soft soil
- Human Shield , the use of civilians to deter an attack in warfare
- Dalkon Shield , a not so successful IUD device (contraception).
- Riot Shield , used by police forces around the world for crowd control purposes
- Information Sign , when shaped like a shield, often replicated on maps to display road numbers
- Badge , which is called a "shield" in North American slang
- Shielding, a term used informally within some Online Communities to describe methods used by Empathic individuals to protect themselves from emotional overwhelm and over-stimulation caused by proximity to other people.
- Radiation Shielding and Lead Shielding
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