1. the process of installing equipment, components, or modifications to an existing structure or system after its initial construction or manufacture
Usage: common in engineering, construction, and industrial contexts

1. to install or add equipment or modifications to an existing structure or system after its initial construction
Usage: present participle of backfit

Examples

• The building underwent backfitting to meet new safety codes.
• They are backfitting the older aircraft with modern avionics systems.
• Backfitting solar panels to existing homes has become increasingly popular.
• The factory completed backfitting its machinery with automated controls.
• Engineers proposed backfitting the bridge with reinforced supports.
• Backfitting existing vehicles with emission-reduction technology is costly but necessary.