We found 20 dictionaries that define the word spontaneously:

General (16 matching dictionaries)

1. spontaneously: Merriam-Webster
2. spontaneously: Oxford Learner's Dictionaries
3. spontaneously: Collins English Dictionary
4. spontaneously: Vocabulary.com
5. Spontaneously, spontaneously: Wordnik
6. spontaneously: Cambridge Advanced Learner's Dictionary
7. spontaneously: Wiktionary
8. spontaneously: Dictionary.com
9. spontaneously: Cambridge Essential American English Dictionary
10. spontaneously: Rhymezone
11. spontaneously: Webster's 1828 Dictionary
12. spontaneously: FreeDictionary.org
13. spontaneously: Mnemonic Dictionary
14. spontaneously: TheFreeDictionary.com

Business (1 matching dictionary)

15. spontaneously: Legal dictionary

Computing (1 matching dictionary)

16. spontaneously: Encyclopedia

Medicine (2 matching dictionaries)

17. spontaneously: Merriam-Webster Medical Dictionary
18. spontaneously: Medical dictionary

(Note: See spontaneous as well.)

Definitions from Wiktionary (spontaneously) ▸ adverb:  In a spontaneous manner; naturally; voluntarily. Similar: impromptu, ad lib, ad libitum, unspontaneously, subspontaneously, unforcedly, ultroneously, willingly, voluntarily, semispontaneously, more... Opposite: planned, deliberate, intentional, premeditated, calculated Types: chemical, biological, thermal, radioactive, neutron, gamma, beta, alpha, electromagnetic, nuclear, more... Phrases: spontaneously broken, spontaneously abort, to spontaneously create, perform spontaneously, speaking spontaneously, more... Colors:     electric blue,     neon green,     hot pink,     lime green,     bright yellow, more... ▸ Words similar to spontaneously ▸ Usage examples for spontaneously ▸ Idioms related to spontaneously ▸ Wikipedia articles (New!) ▸ Words that often appear near spontaneously ▸ Rhymes of spontaneously ▸ Invented words related to spontaneously