A bastion is a fortified place that provides strong protection or defense. In medieval times, bastions were the projecting parts of castle walls where soldiers could stand and defend against attackers from multiple angles. These stone structures gave defenders a powerful advantage because they could see approaching enemies clearly and protect vulnerable sections of the fortress.

Today, we use bastion more broadly to describe any place or thing that strongly defends or preserves something important. A library might be called a bastion of learning because it protects and promotes knowledge. A person who refuses to give up their principles might be described as a bastion of integrity. When Switzerland remained neutral during World War II while war raged around it, the country became a bastion of peace in a violent time.

The word suggests strength and steadfastness. A bastion doesn't just casually support something; it stands firm and unyielding. If your school is known as a bastion of academic excellence, it means the school actively maintains high standards year after year, protecting that reputation even when outside pressures might push it to lower expectations. Think of a bastion as a stronghold, a place or person that won't easily surrender what it protects.