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We found 27 dictionaries with English definitions that include the word tiredness:
Click on the first link on a line below to go directly to a page where "tiredness" is defined.

General (19 matching dictionaries)

1. tiredness: Merriam-Webster.com [home, info]
2. tiredness: Oxford Dictionaries [home, info]
3. tiredness: Collins English Dictionary [home, info]
4. tiredness: Vocabulary.com [home, info]
5. Tiredness, tiredness: Wordnik [home, info]
6. tiredness: Cambridge Advanced Learner's Dictionary [home, info]
7. tiredness: Wiktionary [home, info]
8. tiredness: Dictionary.com [home, info]
9. Tiredness: Wikipedia, the Free Encyclopedia [home, info]
10. Tiredness: Online Plain Text English Dictionary [home, info]
11. tiredness: Webster's Revised Unabridged, 1913 Edition [home, info]
12. tiredness: Rhymezone [home, info]
13. Tiredness: AllWords.com Multi-Lingual Dictionary [home, info]
14. tiredness: Webster's 1828 Dictionary [home, info]
15. tiredness: Free Dictionary [home, info]
16. tiredness: Mnemonic Dictionary [home, info]
17. tiredness: WordNet 1.7 Vocabulary Helper [home, info]
18. tiredness: LookWAYup Translating Dictionary/Thesaurus [home, info]
19. tiredness: Dictionary/thesaurus [home, info]

Business (2 matching dictionaries)

20. tiredness: Legal dictionary [home, info]
21. tiredness: Financial dictionary [home, info]

Computing (1 matching dictionary)

22. tiredness: Encyclopedia [home, info]

Medicine (3 matching dictionaries)

23. Tiredness: MedTerms.com Medical Dictionary [home, info]
24. Tiredness: University of Maryland Glossary of Medical Terms [home, info]
25. Tiredness: Drug Medical Dictionary [home, info]

Miscellaneous (1 matching dictionary)

26. tiredness: Idioms [home, info]

Slang (1 matching dictionary)

27. tiredness: Urban Dictionary [home, info]

(Note: See tiredly for more definitions.)

Quick definitions from WordNet (tiredness) ▸ noun:  temporary loss of strength and energy resulting from hard physical or mental work ▸ Also see tiredly ▸ Words similar to tiredness ▸ Usage examples for tiredness ▸ Popular adjectives describing tiredness ▸ Words that often appear near tiredness ▸ Rhymes of tiredness ▸ Invented words related to tiredness