1. the action of building or constructing something
2. buildings or structures that have been built

Examples

• The erections of new apartment buildings transformed the neighborhood.
• City planners approved the erections of three office towers downtown.
• The company specializes in the erections of steel frame structures.
• These concrete erections will serve as flood barriers.
• The erections along Main Street date back to the 1920s.
• Workers began the erections of temporary scaffolding around the monument.