N-SING（单数型名词） If a group of people have a siege mentality, they think that other people are constantly trying to harm or defeat them, and so they care only about protecting themselves. 受围心态; 总是感觉别人在尝试伤害或打败自己，因此一味想要自我保护的心态 [also no det]
Police officers had a siege mentality that isolated them from the people they served.
警察过去有一种受围心态，这使他们与其服务的民众孤立开来。