impervious to or free of dust.

Origin of dustproof

First recorded in 1865–70; dust + -proof
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019

Examples from the Web for dustproof

Historical Examples of dustproof

  • The bearings and cams of such a shaft are generally enclosed in oil and dustproof casing screwed to the top of the cylinders.

    The Gasoline Motor

    Harold Whiting Slauson

  • After bridling, drop a little oil paint into the heel of the brush and set it away in a dustproof compartment for a few days.