1. a tall vertical structure of stone, wood, or metal, used as a support for a building
2. a person who is an important supporter of something
3. something shaped like a column

Examples

• The ancient temple was supported by marble pillars.
• She has been a pillar of the community for decades.
• The bridge rests on concrete pillars.
• He is considered a pillar of strength in difficult times.
• A pillar of smoke rose from the chimney.
• The pillars of democracy include free speech and fair elections.