Definitions

from The American Heritage® Dictionary of the English Language, 4th Edition

  • adj. Impenetrable by light: film stored in lightproof containers.

from Wiktionary, Creative Commons Attribution/Share-Alike License

  • adj. Sealed so that no light can enter.

from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.

  • adj. not penetrable by light

Etymologies

light +‎ -proof (Wiktionary)

Examples

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