Boyd’s Bible Dictionary:
(cover). A defensive piece of armor, varying in size and shape, and made of skin or metal. Worn on left arm. Metaphorically, divine protection (Judg. 5:8; 1 Kings 10:17; Psa. 3:3).
Concise Bible Dictionary:
As a protection for the body, see ARMOUR.
Strong’s Dictionary of Hebrew Words:
Meaning:
from 7980; probably a shield (as controlling, i.e. protecting the person)