We found 34 dictionaries that define the word sincere:

General (28 matching dictionaries)

1. sincere: Merriam-Webster.com
2. sincere: Oxford Learner's Dictionaries
3. sincere: American Heritage Dictionary of the English Language
4. sincere: Collins English Dictionary
5. sincere: Vocabulary.com
6. Sincere, sincere: Wordnik
7. sincere: Cambridge Advanced Learner's Dictionary
8. Sincere, sincere: Wiktionary
9. sincere: Webster's New World College Dictionary, 4th Ed.
10. sincere: The Wordsmyth English Dictionary-Thesaurus
11. sincere: Infoplease Dictionary
12. sincere: Dictionary.com
13. sincere: Online Etymology Dictionary
14. sincere: Cambridge Essential American English Dictionary
15. Sincere (album), Sincere (song), Sincere: Wikipedia, the Free Encyclopedia
16. Sincere: Online Plain Text English Dictionary
17. sincere: Webster's Revised Unabridged, 1913 Edition
18. sincere: Rhymezone
19. sincere, sincre: AllWords.com Multi-Lingual Dictionary
20. sincere: Webster's 1828 Dictionary
21. sincere: Free Dictionary
22. sincere: Mnemonic Dictionary
23. sincere: LookWAYup Translating Dictionary/Thesaurus
24. Sincere: The Word Detective
25. sincere: Dictionary/thesaurus
26. sincere: Wikimedia Commons US English Pronunciations

Business (1 matching dictionary)

27. sincere: Legal dictionary

Computing (1 matching dictionary)

28. sincere: Encyclopedia

Medicine (1 matching dictionary)

29. online medical dictionary (No longer online)

Miscellaneous (2 matching dictionaries)

30. SINCERE: Acronym Finder
31. sincere: Idioms

Slang (1 matching dictionary)

32. sincere: Urban Dictionary

(Note: See sincerely as well.)

Definitions from Wiktionary ( ) ▸ adjective:  Genuine; meaning what one says or does; heartfelt. ▸ adjective:  Meant truly or earnestly. ▸ adjective:  (archaic) clean; pure ▸ noun:  A male given name Similar: honest, bona fide, in earnest, wholehearted, true, whole-souled, earnest, heart-whole, cordial, dear, more... Opposite: insincere, dishonest, deceitful, disingenuous, untruthful Types: honest, true, authentic, legit, real, more... Phrases: Sincere McCormick, Salvatore Sincere, honest and sincere, not sincere, very sincere, more... Colors:     sky blue,     lavender,     mint green,     peach,     coral,     ivory,     baby blue,     powder blue,     blush,     periwinkle ▸ Word origin ▸ Words similar to sincere ▸ Usage examples for sincere ▸ Idioms related to sincere ▸ Wikipedia articles (New!) ▸ Popular adjectives describing sincere ▸ Popular nouns described by sincere ▸ Words that often appear near sincere ▸ Rhymes of sincere ▸ Invented words related to sincere