Definitions

lightless

[lahyt-lis] / ˈlaɪt lɪs /

ADJECTIVE

dark

Synonyms

STRONGEST

black cloudy darkened dim dingy drab dull foggy gloomy misty murky overcast shadowy somber

STRONG

dun faint

WEAK

aphotic atramentous blackish caliginous cimmerian clouded crepuscular dusky ill-lighted indistinct inky lurid nebulous obfuscous obscure opaque pitch-black pitch-dark pitchy rayless shaded shady sooty stygian sunless tenebrous unlighted unlit vague

Antonyms

STRONGEST

bright cheerful clean clear distinct good happy intelligent joyful light luminous smart sparkling sunny vivacious

WEAK

apparent brilliant encouraging evident hopeful illuminated lucid manifest moral plain pleased radiant shining visible vivid

ADJECTIVE

dim

Synonyms

STRONGEST

blurred cloudy dark dingy dull faint fuzzy gloomy lackluster murky shadowy vague

STRONG

dusk faded gray mat muted obscured overcast pale sullied tarnished

WEAK

blah bleary caliginous dreary dusky flat ill-defined indistinct monotone monotonous opaque poorly lit tenebrous unclear unilluminated weak

Antonyms

STRONGEST

bright cheerful clear distinct encouraging happy light lively luminous shining sparkling vivacious

WEAK

brilliant favorable good intelligent smart

ADJECTIVE

dusky

Synonyms

STRONGEST

smoky

WEAK

adusk bistered caliginous cloudy crepuscular dark darkish dim dull gray obscure overcast sable shadowy shady tenebrous twilight twilit unilluminated veiled

Antonyms

STRONGEST

vivid

WEAK

bright clear light

ADJECTIVE

gloomy

Synonyms

STRONGEST

bleak cloudy dim dismal dreary dull forlorn funereal murky overcast somber

WEAK

caliginous cheerless clouded crepuscular desolate dusky obscure overclouded sepulchral shadowy tenebrous unilluminated unlit wintry

Antonyms

STRONGEST

bright cheerful clear happy hopeful intelligent joyful light lively luminous pleasant smart sunny

WEAK

animated content encouraged encouraging exhilarating sparkling uplifting vivacious

ADJECTIVE

obscure

Synonyms

STRONGEST

murky

STRONG

blurred clouded dim dusk faint obfuscated veiled

WEAK

caliginous dark dense dusky fuliginous gloomy indistinct shady somber tenebrous umbrageous unilluminated unlit

Antonyms

STRONG

clear distinct

WEAK

apparent bright explicit obvious perceptible visible

ADJECTIVE

tenebrous

Synonyms

WEAK

ambiguous amphibological caliginous dim dingy dusk dusky equivocal gloomy murky obscure shadowy shady somber sunless uncertain unclear unexplicit unilluminated unintelligible unlit vague

Antonyms

WEAK

inviting light

Example Sentences

Examples are provided to illustrate real-world usage of words in context. Any opinions expressed do not reflect the views of Dictionary.com.

While you can’t help but appreciate the cherry red of the deep-sea atolla jellyfish, you will also learn why its unusual pigment persists in the lightless depths.

From The Wall Street Journal • Nov. 21, 2025

Much of the deep ocean is vacant, with extremely cold, lightless regions making it difficult for life as we know it to survive.

From Salon • May 21, 2025

The incident left her concussed, needing to stay in a lightless room for five days and only worsened the chronic migraines she has battled as an adult.

From Los Angeles Times • Jan. 7, 2024

“At this point we have a lightless lighthouse until the Coast Guard can effect the repairs.”

From Seattle Times • Aug. 2, 2023

He was still bent over staring with one eye into the lightless, unstirring void of the soldier in white’s mouth when the doctors and the M.P.s came running to help Yossarian pull him away.

From "Catch-22" by Joseph Heller

lightless

Example Sentences

Related Words