Pillar/ˈpɪlər/ Definition 1 of 4Pro Tip 1/3Architectural Context Used in architecture; might indicate historical or significant structures. The cathedral is famous for its ornate pillars. Pro Tip 2/3Visual Imagery Imagine a vertical structure holding something up for clearer understanding. We added four concrete pillars to support the new roof. Pro Tip 3/3Physical Strength Denotes strength or sturdiness in a physical context. The stone pillars can withstand heavy earthquakes.