What is the meaning of the word "unarmed"?

Definitions:

  1. (used of persons or the military) not having or using arms copy to clipboard adjective
    • went alone and unarmed copy to clipboard
  2. used of plants or animals, lacking barbs, stings, or thorns copy to clipboard adjective
    • This species of cactus is unarmed until it is about two years old. copy to clipboard