We found 18 dictionaries that define the word speediness:

General (15 matching dictionaries)

1. speediness: Merriam-Webster
2. speediness: Oxford Learner's Dictionaries
3. speediness: Collins English Dictionary
4. speediness: Vocabulary.com
5. speediness: Wordnik
6. speediness: Cambridge Advanced Learner's Dictionary
7. speediness: Wiktionary
8. speediness: Dictionary.com
9. Speediness: Online Plain Text English Dictionary
10. speediness: Webster's Revised Unabridged, 1913 Edition
11. Speediness: AllWords.com Multi-Lingual Dictionary
12. speediness: Webster's 1828 Dictionary
13. speediness: FreeDictionary.org
14. speediness: Mnemonic Dictionary
15. speediness: TheFreeDictionary.com

Business (1 matching dictionary)

16. speediness: Legal dictionary

Computing (1 matching dictionary)

17. speediness: Encyclopedia

Medicine (1 matching dictionary)

18. online medical dictionary (No longer online)

(Note: See speedy as well.)

Definitions from Wiktionary (speediness) ▸ noun:  The property of being fast; swiftness. Similar: swiftness, fastness, speedfulness, rapidity, fleetness, speed, swift-handedness, rapidness, quickness, expeditiousness, more... Opposite: slowness, lethargy, deliberateness, unhurriedness ▸ Words similar to speediness ▸ Usage examples for speediness ▸ Idioms related to speediness ▸ Wikipedia articles (New!) ▸ Popular adjectives describing speediness ▸ Words that often appear near speediness ▸ Rhymes of speediness ▸ Invented words related to speediness