1. openings in a floor or deck through which a staircase passes
Usage: architecture; construction
2. vertical shafts or openings that provide access to wells or underground spaces
Usage: technical

Examples

• The carpenter measured the wellholes before installing the staircase.
• Building codes specify minimum dimensions for wellholes in residential construction.
• The architect designed decorative railings around the wellholes.
• Workers covered the wellholes with temporary boards for safety.
• The wellholes in the old building needed to be enlarged to meet current standards.
• Proper framing around wellholes is essential for structural integrity.