1. insulating material used to cover pipes, boilers, or other equipment
Usage: technical

1. falling behind in movement, progress, or development

1. present participle of lag; falling behind or moving slowly

Examples

• The lagging student needed extra help with math.
• Sales were lagging behind last year’s numbers.
• The old pipes needed new lagging to prevent heat loss.
• Workers installed lagging around the boiler.
• The team is lagging in the championship race.
• She was lagging behind the group on the hiking trail.
• The lagging economy showed signs of recovery.