light-tight

adj

light-tight

adj

Etymology From light (noun) + tight (adjective).

1

Impervious to light; excluding the light perfectly.

From a practical point of view it is not always possible to achieve an absolute lighttight home darkroom.2000, Stephen G. Anchell, The darkroom cookbook, page 127:

Synonyms: lightproof
Related terms: For other similar compound words, the derived terms under tight

Entry derived from the Wiktionary, under licence CC BY-SA 4.0 — list of authors.