1. impermeable to air; sealed so that air cannot enter or escape

1. to make airproof; to seal against the passage of air
Usage: less common than the adjective form

Examples

• The container has an airproof seal to keep the food fresh.
• We need to airproof the windows before winter arrives.
• An airproof bag prevents moisture from entering the package.
• The laboratory requires airproof chambers for sensitive experiments.
• They airproofed the attic to improve energy efficiency.