- bastion - a group that defends a principle; "a bastion against corruption"; "the last bastion of communism"
--1 is a kind of defense, defence, defense force, defence force
- bastion, citadel - a stronghold into which people could go for shelter during a battle
--2 is a kind of stronghold, fastness
--2 has particulars: acropolis; kremlin; Kremlin- bastion - projecting part of a rampart or other fortification
--3 is a kind of fortification, munition
- bastion, citadel - a stronghold into which people could go for shelter during a battle