We found 22 dictionaries that define the word ones:

General (15 matching dictionaries)

1. -ones, ones: Merriam-Webster
2. one's, one's: Collins English Dictionary
3. ones: Vocabulary.com
4. One's, Ones, Ones, one's, ones, ones, ones: Wordnik
5. ones: Cambridge Advanced Learner's Dictionary
6. one's, ones, the ones: Wiktionary
7. Ones, ones: Dictionary.com
8. Ones (Selena album), Ones (album), The Ones: Wikipedia, the Free Encyclopedia
9. Ones: Online Plain Text English Dictionary
10. ones: Webster's Revised Unabridged, 1913 Edition
11. Ones: AllWords.com Multi-Lingual Dictionary
12. ones: FreeDictionary.org
13. Ones, one's: TheFreeDictionary.com
14. ones: Wikimedia Commons US English Pronunciations
15. ones: Wordnik

Business (1 matching dictionary)

16. Ones: Legal dictionary

Computing (1 matching dictionary)

17. Ones: Encyclopedia

Miscellaneous (3 matching dictionaries)

18. ONES: Acronym Finder
19. AbbreviationZ (No longer online)
20. Ones: Idioms

Slang (2 matching dictionaries)

21. ones, ones, ones: Green’s Dictionary of Slang
22. The Ones: Urban Dictionary

(Note: See one as well.)

Definitions from Wiktionary (ones) ▸ noun:  (sports) A senior or first team (as opposed to a reserves team). ▸ noun:  (UK, prison slang) The cells located on the ground floor. Similar: United, unitary, combined, Same, unity, cardinal, unrivalled, single, one and only, extraordinary, more... Opposite: multiples, none, zero, all, everyone Types: twos, threes, fours, fives, sixes, sevens, eights, nines, tens, more... Phrases: The Ones, loved ones, old ones, little ones, young ones, more... Adjectives: new, only, little, old, smaller, young, larger, important, big, bad, earlier Colors:     crimson,     scarlet,     ruby,     rose,     coral, more... ▸ Words similar to ones ▸ Usage examples for ones ▸ Idioms related to ones ▸ Wikipedia articles (New!) ▸ Popular adjectives describing ones ▸ Words that often appear near ones ▸ Rhymes of ones ▸ Invented words related to ones