Answer:

Definition of Bastion:
A bastion is a fortified area or stronghold that is built to defend or protect a particular area. It is commonly used in military contexts to refer to a fortified structure or position that acts as a defensive barrier or a strategic point.

Explanation:
The term "bastion" is often used to describe an area or position that is strongly fortified and provides a secure defense against enemy forces. It can refer to both physical structures, such as fortresses or castles, as well as metaphorical concepts, such as a strong political or ideological position.

Key Points:
- A bastion is an area or position that is fortified and serves as a stronghold or defensive barrier.
- It can refer to both physical structures and metaphorical concepts.
- The primary purpose of a bastion is to provide protection and defense against enemy forces.
- Bastions are often strategically located at key points, such as along borders or at entrances to cities or forts.
- They are designed to withstand attacks and provide a safe haven for the defending forces.
- Bastions can have various features, including thick walls, towers, moats, and other defensive structures.
- In military terms, a bastion is a crucial part of a defensive strategy and can play a significant role in determining the outcome of a battle or conflict.

SSC CGL Category:
The SSC CGL (Staff Selection Commission Combined Graduate Level) is an exam conducted by the Government of India to recruit staff for various positions in ministries, departments, and organizations of the Government of India. The category mentioned in the question indicates that the term "bastion" is related to the field of defense and military fortifications, which is relevant to the SSC CGL exam.