We found 26 dictionaries that define the word usefulness:

General (21 matching dictionaries)

1. usefulness: Longman Dictionary of Contemporary English
2. usefulness: Merriam-Webster
3. usefulness: Oxford Learner's Dictionaries
4. usefulness: Collins English Dictionary
5. usefulness: Vocabulary.com
6. Usefulness, usefulness: Wordnik
7. usefulness: Cambridge Advanced Learner's Dictionary
8. usefulness: Wiktionary
9. usefulness: Dictionary.com
10. usefulness: Cambridge Essential American English Dictionary
11. Usefulness: Wikipedia, the Free Encyclopedia
12. Usefulness: Online Plain Text English Dictionary
13. usefulness: Webster's Revised Unabridged, 1913 Edition
14. usefulness: Rhymezone
15. Usefulness: AllWords.com Multi-Lingual Dictionary
16. usefulness: Webster's 1828 Dictionary
17. usefulness: FreeDictionary.org
18. usefulness: Mnemonic Dictionary
19. usefulness: TheFreeDictionary.com

Business (3 matching dictionaries)

20. Everybody's Legal Dictionary (No longer online)
21. usefulness: Legal dictionary
22. usefulness: Financial dictionary

Computing (1 matching dictionary)

23. usefulness: Encyclopedia

Miscellaneous (1 matching dictionary)

24. A Brief Critical Dictionary of Education (No longer online)

(Note: See usefulnesss as well.)

Definitions from Wiktionary ( ) ▸ noun:  The quality or degree of being useful. Similar: utility, usefullness, usedness, helpfulness, unusefulness, usableness, profitableness, efficientness, beneficiality, practicalness, more... Opposite: futility, uselessness, inefficacy, ineffectiveness, worthlessness Types: practical, utilitarian, pragmatic, pragmatist, utilitarianism, pragmatism, more... Phrases: usefulness of a tool, the usefulness, determine the usefulness of a text, more... Adjectives: potential, limited, practical, clinical, great, social, future, general, possible, public, real ▸ Words similar to usefulness ▸ Usage examples for usefulness ▸ Idioms related to usefulness ▸ Wikipedia articles (New!) ▸ Popular adjectives describing usefulness ▸ Words that often appear near usefulness ▸ Rhymes of usefulness ▸ Invented words related to usefulness