1. large rocks, typically ones that have been worn smooth by water or weather

Examples

• The hikers climbed over massive boulders to reach the summit.
• Ancient glaciers left these boulders scattered across the valley.
• Children love to jump from boulder to boulder along the creek.
• The landscaper used decorative boulders to create a natural garden border.
• Flash floods can move enormous boulders downstream.
• Rock climbers practice their skills on the granite boulders in the park.