Lightproof

adj

adj ·Rare ·Advanced level

Definitions

Adjective
  1. 1
    Sealed so that no light can enter.

    "Unexposed photographic film must be kept in a lightproof container or it will be exposed and ruined."

Adjective
  1. 1
    not penetrable by light wordnet

Synonyms

All synonyms
airtightclosecompactdustproofdusttightfast

Example

More examples

"Unexposed photographic film must be kept in a lightproof container or it will be exposed and ruined."

Etymology

From light + -proof.

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Data sourced from Wiktionary, WordNet, CMU, and other open linguistic databases. Updated March 2026.