(Hebrews kob'a), a cap for the defence of the head (1 Samuel 17:5, 38). In the New Testament the Greek equivalent is used (Ephesians 6:17; 1 Thessalonians 5:8). (see ARMS.)

Noah Webster's New International Dictionary of the English Language

1. (n.) A defensive covering for the head.

2. (n.) The representation of a helmet over shields or coats of arms, denoting gradations of rank by modifications of form.

3. (n.) A helmet-shaped hat, made of cork, felt, metal, or other suitable material, worn as part of the uniform of soldiers, firemen, etc., also worn in hot countries as a protection from the heat of the sun.

4. (n.) That which resembles a helmet in form, position, etc.

5. (n.) The upper part of a retort.

6. (n.) The hood-formed upper sepal or petal of some flowers, as of the monkshood or the snapdragon.

7. (n.) A naked shield or protuberance on the top or fore part of the head of a bird.