bastion
//ˈbæs.ti.ən//
Noun
bastionSingular
bastionsPlural
1
A projecting part of a fortification built at an angle to the line of a wall, allowing defensive fire in several directions.
The castle's bastions allowed soldiers to defend against attacks from multiple angles.
2
A stronghold or fortified place; a place of defense or protection.
The ancient castle served as a bastion against enemy invasions.
3
A person, institution, or thing that strongly defends or upholds particular principles, attitudes, or activities.
The university has long been a bastion of academic freedom.