Answer:
1. To make safe; to relieve from apprehensions of, or exposure to, danger; to guard; to protect.
2. To put beyond hazard of losing or of not receiving; to make certain; to assure; frequently with against or from, or formerly with of.
3. To make fast; to close or confine effectually; to render incapable of getting loose or escaping.
Secured is also the past participle of secure.
Here are some examples of the word secured being used in sentences:
He secured it with a shoe on either side.
Pulling her hair into a ponytail, she secured it with a blue ribbon.
Once borders are secured, nations turn to social order.
Once the garage door was secured, she pulled away from the house.
I hope this answer helps you out!