A more thorough explanation:

Definition: An insurgent is a person who uses armed hostility against an established government for political purposes.

Example: The rebels in the civil war were considered insurgents because they were fighting against the government.

Explanation: The example illustrates the definition of an insurgent because the rebels were using armed hostility against the established government for political purposes. They were fighting to overthrow the government and establish their own political system.

Additional Example: The group of militants who attacked the government building were labeled as insurgents because they were using violence to achieve their political goals.

Explanation: This example also illustrates the definition of an insurgent because the militants were using armed hostility against the established government for political purposes. They were trying to achieve their political goals through violent means.