We found 18 dictionaries that define the word ons:

General (12 matching dictionaries)

1. ons: Longman Dictionary of Contemporary English
2. -ons: Merriam-Webster
3. ONS: Collins English Dictionary
4. ON's, On's, Ons, on's, ons, ons, ons: Wordnik
5. ONS, -ons: Dictionary.com
6. ONS (TV channel), ONS: Wikipedia, the Free Encyclopedia
7. -ons: Online Plain Text English Dictionary
8. ons (de): AllWords.com Multi-Lingual Dictionary
9. ONS: Stammtisch Beau Fleuve Acronyms
10. ons: FreeDictionary.org
11. ONS: TheFreeDictionary.com
12. ONS: Wiktionary

Medicine (1 matching dictionary)

13. ONS: Medical dictionary

Miscellaneous (3 matching dictionaries)

14. ONS: Acronym Finder
15. ONS: Three Letter Words with definitions
16. AbbreviationZ (No longer online)

Science (1 matching dictionary)

17. How Many? A Dictionary of Units of Measurement (No longer online)

Slang (1 matching dictionary)

18. ONS: Urban Dictionary

Definitions from Wiktionary (ONS) ▸ noun:  (UK) Initialism of Office for National Statistics. Similar: nos, tig, enticement, GATS, cropper, flam, IDS, negligee, Purdy, lothario, more... Opposite: offs, endings, closures Types: covalent, hydrogen, ionic, polar, nonpolar, more... Phrases: add ons, carry ons, turn ons, hard ons, slip ons, more... Adjectives: add, come, hard, run, turn, put, follow, strap, roll, sexual, stick ▸ Words similar to ons ▸ Usage examples for ons ▸ Idioms related to ons ▸ Wikipedia articles (New!) ▸ Popular adjectives describing ons ▸ Words that often appear near ons ▸ Rhymes of ons ▸ Invented words related to ons