Bastion
- A projecting part of a fortification built at an angle to the line of a wall, so as to allow defensive fire in several directions. nounThe soldiers took cover behind the bastion during the attack.The ancient castle's bastion provided a strategic advantage against invaders.
- An institution, place, or person strongly defending or upholding particular principles, attitudes, or activities. nounThe university is considered a bastion of liberal thought.The small town was a bastion of traditional values in a rapidly changing world.