We found 24 dictionaries that define the word windowsill:

General (20 matching dictionaries)

1. windowsill: Longman Dictionary of Contemporary English
2. windowsill: Merriam-Webster
3. windowsill: Oxford Learner's Dictionaries
4. windowsill: American Heritage Dictionary of the English Language
5. windowsill: Collins English Dictionary
6. windowsill: Vocabulary.com
7. Windowsill, windowsill: Wordnik
8. windowsill: Cambridge Advanced Learner's Dictionary
9. windowsill: Wiktionary
10. windowsill: Webster's New World College Dictionary, 4th Ed.
11. windowsill: Dictionary.com
12. windowsill: Cambridge Essential American English Dictionary
13. Windowsill: Wikipedia, the Free Encyclopedia
14. windowsill: Rhymezone
15. windowsill: FreeDictionary.org
16. windowsill: Mnemonic Dictionary
17. windowsill: TheFreeDictionary.com
18. windowsill: Wikimedia Commons US English Pronunciations

Business (2 matching dictionaries)

19. windowsill: Legal dictionary
20. windowsill: Financial dictionary

Computing (1 matching dictionary)

21. windowsill: Encyclopedia

Medicine (1 matching dictionary)

22. windowsill: Medical dictionary

(Note: See windowsills as well.)

Definitions from Wiktionary ( ) ▸ noun:  (architecture) The horizontal member protruding from the base of a window frame. Similar: window box, windowmaking, window screen, winda, wheel window, winder, stop bead, fillister, valve, lattice window, more... Opposite: ceiling, wall, exterior, outdoors. Adjectives: sunny, wide, broad, deep, low, open, high, outside, narrow, warm, bright Colors:     white,     beige,     light gray,     soft blue,     sage green, more... ▸ Words similar to windowsill ▸ Usage examples for windowsill ▸ Idioms related to windowsill ▸ Wikipedia articles (New!) ▸ Popular adjectives describing windowsill ▸ Words that often appear near windowsill ▸ Rhymes of windowsill ▸ Invented words related to windowsill