Used to denote power (Psalm 10:15; Ezek. 30:21; Jeremiah 48:25). It is also used of the omnipotence of God (Exodus 15:16; Psalm 89:13; 98:1; 77:15; Isaiah 53:1; John 12:38; Acts 13:17)

Noah Webster's New International Dictionary of the English Language

1. (n.) The limb of the human body which extends from the shoulder to the hand; also, the corresponding limb of a monkey.

2. (n.) Anything resembling an arm

3. (n.) The fore limb of an animal, as of a bear.

4. (n.) A limb, or locomotive or prehensile organ, of an invertebrate animal.

5. (n.) A branch of a tree.

6. (n.) A slender part of an instrument or machine, projecting from a trunk, axis, or fulcrum; as, the arm of a steelyard.

7. (n.) The end of a yard; also, the part of an anchor which ends in the fluke.

8. (n.) An inlet of water from the sea.

9. (n.) A support for the elbow, at the side of a chair, the end of a sofa, etc.

10. (n.) Fig.: Power; might; strength; support; as, the secular arm; the arm of the law.

11. (n.) A branch of the military service; as, the cavalry arm was made efficient.

12. (n.) A weapon of offense or defense; an instrument of warfare; -- commonly in the pl.

13. (v. t.) To take by the arm; to take up in one's arms.

14. (v. t.) To furnish with arms or limbs.

15. (v. t.) To furnish or equip with weapons of offense or defense; as, to arm soldiers; to arm the country.

16. (v. t.) To cover or furnish with a plate, or with whatever will add strength, force, security, or efficiency; as, to arm the hit of a sword; to arm a hook in angling.

17. (v. t.) Fig.: To furnish with means of defense; to prepare for resistance; to fortify, in a moral sense.

18. (v. i.) To provide one's self with arms, weapons, or means of attack or resistance; to take arms.