lightless

adjective

light·​less ˈlīt-ləs 

1

: receiving no light : dark

2

: giving no light

Synonyms

• black
• caliginous
• dark
• darkened
• darkish
• darkling
• darksome
• dim
• dimmed
• dusk
• dusky
• gloomy
• murky
• obscure
• obscured
• pitch-black
• pitch-dark
• pitchy
• rayless
• somber
• sombre
• stygian
• tenebrific
• tenebrous
• unlit

Examples of lightless in a Sentence

wondered what might be lurking in the lightless corners of the basement

Recent Examples on the Web

For this reason black holes are invisible to the eye, as lightless as the empty, dark space surrounding them. —Sidney Stevens, Treehugger, 14 Mar. 2025

Fall asleep and dream about being slowly forced, as if by some mechanized peristalsis, through the digestive tract of a huge synthetic worm that then deposits me into a lightless industrial kitchen. —Jay Katsir, The New Yorker, 9 Jan. 2025

Fall asleep and dream about being slowly forced, as if by some mechanized peristalsis, through the digestive tract of a huge synthetic worm that then deposits me into a lightless industrial kitchen. —Jay Katsir, The New Yorker, 9 Jan. 2025

While rappelling into some supposedly haunted mines in Chile in 2010, Gates and a cameraman got trapped in a lightless mine shaft. —Vulture, 5 Jan. 2024

Word History

First Known Use

before the 12th century, in the meaning defined at sense 1

Rhymes for lightless

• flightless
• sightless