1. people who get up from bed, especially at a particular time
Usage: usually used with ‘early’ or ‘late’
2. the vertical parts of steps in a staircase
Usage: architecture; construction
3. vertical pipes that carry water or other fluids upward in a building
Usage: plumbing; technical

Examples

• My parents are early risers who wake up at 5 AM every day.
• She’s always been a late riser, preferring to sleep until noon.
• The carpenter measured each riser to ensure the stairs were uniform.
• The building’s water risers needed to be replaced after 30 years.
• Early risers often feel more productive throughout the day.
• The risers on these stairs are too high for elderly residents.
• A plumber inspected the risers in the apartment building.