sincere
adjective
sin·cere sin-ˈsir 
sən-
sincerer; sincerest
1
a
: free of dissimulation : honest
a sincere interest
b
: free from adulteration : pure
a sincere doctrine
sincere wine
2
: marked by genuineness : true
sincereness noun
Synonyms
- heartfelt
- unfeigned
See all Synonyms & Antonyms 
Example Sentences
He sounded sincere in his promises. She seemed sincere in her commitment to finish school. She has a sincere interest in painting. He showed a sincere concern for her health. He made a sincere attempt to quit smoking. Please accept our sincere thanks. See More
Recent Examples on the Web If Andrews was sincere, then the Patriots’ offense could be in big trouble. 
Ben Volin, BostonGlobe.com, 13 Sep. 2022 Stracke also revealed her own experiences with miscarriage, but Jenkins didn't believe her castmate was being sincere. Dory Jackson, Peoplemag, 9 Sep. 2022 These lyrics—unrehearsed, sweet, sincere—became the start of a new dad’s musical awakening. Kathryn Hymes, The Atlantic, 2 Sep. 2022 The track ends with a resolution of sorts, offering a pedagogical yet sincere peek into the singers’ heart. Amanda Alcántara, Rolling Stone, 1 Sep. 2022 What’s next? Al-Sadr’s withdrawal from politics, if sincere, could leave the remaining Shiites, many of whom are backed by Iran, to dominate the country’s politics. Abbas Al Lawati And Adam Pourahmadi, CNN, 31 Aug. 2022 Sending my sincere condolences to you and your family. Giovana Gelhoren, Peoplemag, 20 Aug. 2022 As Nina, making her West End debut, Emilia Clarke is radiantly sincere. David Benedict, Variety, 8 July 2022 Sending my sincere condolences to you and your family. Glenn Garner, PEOPLE.com, 25 July 2022 See More
Ben Volin, BostonGlobe.com, 13 Sep. 2022 Stracke also revealed her own experiences with miscarriage, but Jenkins didn't believe her castmate was being sincere. Dory Jackson, Peoplemag, 9 Sep. 2022 These lyrics—unrehearsed, sweet, sincere—became the start of a new dad’s musical awakening. Kathryn Hymes, The Atlantic, 2 Sep. 2022 The track ends with a resolution of sorts, offering a pedagogical yet sincere peek into the singers’ heart. Amanda Alcántara, Rolling Stone, 1 Sep. 2022 What’s next? Al-Sadr’s withdrawal from politics, if sincere, could leave the remaining Shiites, many of whom are backed by Iran, to dominate the country’s politics. Abbas Al Lawati And Adam Pourahmadi, CNN, 31 Aug. 2022 Sending my sincere condolences to you and your family. Giovana Gelhoren, Peoplemag, 20 Aug. 2022 As Nina, making her West End debut, Emilia Clarke is radiantly sincere. David Benedict, Variety, 8 July 2022 Sending my sincere condolences to you and your family. Glenn Garner, PEOPLE.com, 25 July 2022 See More Word History
Etymology
Middle French, from Latin sincerus whole, pure, genuine, probably from sem- one + -cerus (akin to Latin crescere to grow) — more at same, crescent
First Known Use
1533, in the meaning defined at sense 1a
Kids Definition
sincere
adjective
sin·cere sin-ˈsir
sincerer; sincerest
1
: having or showing honesty : straightforward
a sincere person
2
: being what it seems to be : genuine
sincere good wishes
sincereness
noun
as in sincerity
Synonyms & Similar Words
Relevance
- sincerity
- genuineness
- truthfulness
- frankness
- directness
- forthrightness
- straightforwardness
- candor
- openness
- honesty
- openheartedness
- guilelessness
- artlessness
- probity
- naturalness
- unaffectedness
Antonyms & Near Antonyms
- hypocrisy
- insincerity
- piousness
- dissimulation
- dishonesty
- deception
- dissembling
- deceit
- falsity
- cant
- perfidy
- deceptiveness
- deceitfulness
- pretence
- affectation
- sanctimoniousness
- pretense
- two-facedness
- pretension
- pretentiousness
- affectedness
- double-dealing
- self-satisfaction
- self-righteousness