We found 28 dictionaries that define the word sadness:

General (21 matching dictionaries)

1. sadness: Merriam-Webster.com
2. sadness: Oxford Learner's Dictionaries
3. sadness: Collins English Dictionary
4. sadness: Vocabulary.com
5. Sadness, sadness: Wordnik
6. sadness: Cambridge Advanced Learner's Dictionary
7. sadness: Wiktionary
8. sadness: The Wordsmyth English Dictionary-Thesaurus
9. sadness: Dictionary.com
10. sadness: Cambridge Essential American English Dictionary
11. Sadness (Inside Out), Sadness (video game), Sadness: Wikipedia, the Free Encyclopedia
12. Sadness: Online Plain Text English Dictionary
13. sadness: Webster's Revised Unabridged, 1913 Edition
14. sadness: Rhymezone
15. Sadness: AllWords.com Multi-Lingual Dictionary
16. sadness: Webster's 1828 Dictionary
17. sadness: Free Dictionary
18. sadness: Mnemonic Dictionary
19. sadness: Dictionary/thesaurus

Art (1 matching dictionary)

20. Shakespeare Glossary (No longer online)

Business (1 matching dictionary)

21. sadness: Legal dictionary

Computing (1 matching dictionary)

22. sadness: Encyclopedia

Medicine (3 matching dictionaries)

23. Sadness: Merck Manuals
24. sadness: Medical dictionary
25. University of Maryland Glossary of Medical Terms (No longer online)

Miscellaneous (1 matching dictionary)

26. sadness: Idioms

(Note: See sad as well.)

Definitions from Wiktionary ( ) ▸ noun:  (uncountable) The state or emotion of being sad. ▸ noun:  (countable) An event in one's life that causes sadness. Similar: sorrow, sorrowfulness, unhappiness, sullenness, depressedness, disconsolateness, despondence, depressingness, disappointment, heartbrokenness, more... Opposite: joy, happiness, elation, contentment, bliss Types: grief, heartbreak, loneliness, despair, melancholy, depression, sorrow, regret, more... Phrases: Triangle of Sadness, Mellon Collie and the Infinite Sadness, The Sadness, Belladonna of Sadness, Summertime Sadness, more... Adjectives: great, deepest, profound, much, infinite, certain, terrible, intense, sweet, overwhelming, strange Colors:     blue,     gray,     black,     charcoal,     indigo, more... ▸ Words similar to sadness ▸ Usage examples for sadness ▸ Idioms related to sadness ▸ Wikipedia articles (New!) ▸ Popular adjectives describing sadness ▸ Words that often appear near sadness ▸ Rhymes of sadness ▸ Invented words related to sadness