1. a building divided into three separate apartments or living units

1. having three parts or elements; threefold
Usage: technical

Examples

• They bought a triplex and rent out two of the units.
• The triplex on Main Street has three identical apartments.
• Living in a triplex means sharing walls with two other families.
• The triplex design maximizes the use of the narrow lot.
• The engineer designed a triplex system for redundancy.
• The triplex structure provides three levels of backup.