We found 19 dictionaries that define the word dimensionless:

General (13 matching dictionaries)

1. dimensionless: Merriam-Webster
2. dimensionless: Oxford Learner's Dictionaries
3. dimensionless: Collins English Dictionary
4. dimensionless: Wordnik
5. dimensionless: Wiktionary
6. Dimensionless, dimensionless: Dictionary.com
7. Dimensionless: Wikipedia, the Free Encyclopedia
8. Dimensionless: Online Plain Text English Dictionary
9. dimensionless: Webster's Revised Unabridged, 1913 Edition
10. Dimensionless: AllWords.com Multi-Lingual Dictionary
11. dimensionless: Webster's 1828 Dictionary
12. dimensionless: FreeDictionary.org
13. Dimensionless: TheFreeDictionary.com

Business (1 matching dictionary)

14. dimensionless: Legal dictionary

Computing (1 matching dictionary)

15. dimensionless: Encyclopedia

Medicine (3 matching dictionaries)

16. dimensionless: Merriam-Webster Medical Dictionary
17. Dorland's Illustrated Medical Dictionary (No longer online)
18. dimensionless: Medical dictionary

Tech (1 matching dictionary)

19. Dictionary for Avionics (No longer online)

(Note: See dimension as well.)

Definitions from Wiktionary (dimensionless) ▸ adjective:  Lacking dimensions. ▸ adjective:  (sciences) Of a physical constant: lacking units. Similar: adimensional, sizeless, lengthless, zero-dimensional, massless, scaleless, one-dimensional, zeroless, distanceless, definitionless, more... Opposite: dimensional, measurable, quantifiable Phrases: dimensionless quantity, dimensionless number, dimensionless quantities, dimensionless group, Dimensionless physical constant, more... Adjectives: constant, new, variable, corresponding, single, exponential, longer, average, same, small, above ▸ Words similar to dimensionless ▸ Usage examples for dimensionless ▸ Idioms related to dimensionless ▸ Wikipedia articles (New!) ▸ Popular nouns described by dimensionless ▸ Words that often appear near dimensionless ▸ Rhymes of dimensionless ▸ Invented words related to dimensionless