Also found in: Thesaurus.
1. not lit up or bright with light
2. (Theology) literary (of people, thoughts, or beliefs) not having or inspired by any spiritual or religious revelation of truth
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|Adj.||1.||unilluminated - without illumination; "came up the lightless stairs"; "the unilluminated side of Mars"; "through dark unlighted (or unlit) streets"|
dark - devoid of or deficient in light or brightness; shadowed or black; "sitting in a dark corner"; "a dark day"; "dark shadows"; "dark as the inside of a black cat"