We found 16 dictionaries that define the word sillily:

General (12 matching dictionaries)

1. sillily: Merriam-Webster
2. sillily: Oxford Learner's Dictionaries
3. sillily: Collins English Dictionary
4. sillily: Vocabulary.com
5. sillily: Wordnik
6. sillily: Wiktionary
7. sillily: Dictionary.com
8. Sillily: Online Plain Text English Dictionary
9. sillily: Webster's Revised Unabridged, 1913 Edition
10. Sillily: AllWords.com Multi-Lingual Dictionary
11. sillily: FreeDictionary.org
12. Sillily: TheFreeDictionary.com

Business (1 matching dictionary)

13. sillily: Legal dictionary

Computing (1 matching dictionary)

14. sillily: Encyclopedia

Miscellaneous (1 matching dictionary)

15. sillily: Idioms

Slang (1 matching dictionary)

16. sillily: Urban Dictionary

(Note: See silly as well.)

Definitions from Wiktionary (sillily) ▸ adverb:  (dated or hypercorrect) In a silly manner; foolishly. Similar: sillyly, seelily, slily, asininely, simply, foolishly, sicklily, stupidly, lamely, fondly, more... Opposite: seriously, sensibly, logically, reasonably ▸ Words similar to sillily ▸ Usage examples for sillily ▸ Idioms related to sillily ▸ Wikipedia articles (New!) ▸ Words that often appear near sillily ▸ Rhymes of sillily ▸ Invented words related to sillily