We found 20 dictionaries that define the word lightless:

General (16 matching dictionaries)

1. lightless: Merriam-Webster
2. lightless: Oxford Learner's Dictionaries
3. lightless: Collins English Dictionary
4. lightless: Vocabulary.com
5. lightless: Wordnik
6. lightless: Wiktionary
7. lightless: Infoplease Dictionary
8. Lightless, lightless: Dictionary.com
9. Lightless: Online Plain Text English Dictionary
10. lightless: Webster's Revised Unabridged, 1913 Edition
11. lightless: Rhymezone
12. Lightless: AllWords.com Multi-Lingual Dictionary
13. lightless: Webster's 1828 Dictionary
14. lightless: FreeDictionary.org
15. lightless: Mnemonic Dictionary
16. lightless: TheFreeDictionary.com

Business (1 matching dictionary)

17. lightless: Legal dictionary

Computing (1 matching dictionary)

18. lightless: Encyclopedia

Medicine (1 matching dictionary)

19. lightless: Medical dictionary

Miscellaneous (1 matching dictionary)

20. lightless: Idioms

Definitions from Wiktionary (lightless) ▸ adjective:  Lacking light; unilluminated; dark. Similar: unlighted, invisible, unseeable, unlit, unilluminated, dark, torchless, lampless, darkened, black, more... Opposite: light, illuminated, well-lit Types: dark, dim, unlit, more... ▸ Words similar to lightless ▸ Usage examples for lightless ▸ Idioms related to lightless ▸ Wikipedia articles (New!) ▸ Popular nouns described by lightless ▸ Words that often appear near lightless ▸ Rhymes of lightless ▸ Invented words related to lightless