bastion

Meanings

1. A projecting part of a rampart or other fortification.
2. A well-fortified position; a stronghold or citadel.
3. A person, group, or thing, that strongly defends some principle.
4. Any large prominence; something that resembles a bastion in size and form.

1. To furnish with a bastion.

Etymology

First attested in 1562. From French bastion, from Old French bastille (“fortress”).