1. a substance or chemical treatment applied to fabric or clothing to prevent damage by moths

Examples

• The dry cleaner applied a mothproofer to my winter coat before storing it.
• Many modern mothproofers are less toxic than older formulations.
• She sprayed mothproofer on her wool sweaters to protect them during summer.
• The mothproofer treatment lasted for several months before needing reapplication.
• Mothproofer is especially important for storing delicate fabrics like cashmere and angora.