a strong column made of stone, metal, or wood that supports part of a building(建筑物的)柱子,支柱;墩
A row of reinforced concrete pillars supports the bridge.一排钢筋混凝土柱子支撑着桥梁。
figurative a pillar of smoke/flame烟/火柱
pillar of sth a very important member or part of a group, organization, system, etc.重要成员;栋梁,中坚
Mrs Maple is a pillar of the local church.梅普尔夫人是当地教会的骨干。
Equality is one of the pillars of socialism.平等是社会主义理论的重要组成部分之一。