1 a column of stone, wood or metal that is used for supporting part of a building 柱子；支柱

2 a person who has a strong character and is important to sb/sth 重要成员；栋梁；中坚分子: Dave was a pillar of strength to his sister when she was ill. 戴夫的妹妹生病时，他是她有力的支柱。