not hypocritical or deceitful; open; genuine: a sincere person, sincere regret pure; unadulterated; unmixed
WordReference Random House Learner's Dictionary of American English © 2026
sin•cere /sɪnˈsɪr/USA pronunciation
adj., -cer•er, -cer•est.
sin•cer•i•ty /sɪnˈsɛrɪti/USA pronunciation n. [uncountable]dealing with his students with sincerity.
WordReference Random House Unabridged Dictionary of American English © 2026- not false or pretended:a sincere apology.
- genuine; real:a sincere effort to improve.
sin•cer•i•ty /sɪnˈsɛrɪti/USA pronunciation n. [uncountable]dealing with his students with sincerity.
sin•cere
(sin sēr′),USA pronunciation adj., -cer•er, -cer•est.
sin•cere′ly, adv.
sin•cere′ness, n.
- free of deceit, hypocrisy, or falseness;
earnest:a sincere apology. - genuine;
real:a sincere effort to improve; a sincere friend. - pure;
unmixed;
unadulterated. - [Obs.]sound;
unimpaired.
- Latin sincērus pure, clean, untainted
- 1525–35
sin•cere′ness, n.
- 1.See corresponding entry in Unabridged frank, candid, honest, open, guileless; unaffected. See earnest 1.
- 1, 2.See corresponding entry in Unabridged false.
Collins Concise English Dictionary © HarperCollins Publishers::
'sincere' also found in these entries (note: many are not synonyms or translations):
Honest John
- artless
- ax
- bona fide
- cancel
- candid
- candor
- civil
- commitment
- compliment
- contrite
- contrition
- cordial
- cri de coeur
- deep
- devious
- devout
- diplomatic
- direct
- disingenuous
- doubt
- earnest
- fair
- frank
- genuine
- grandiloquent
- guileless
- heart-to-heart
- heart-whole
- heartily
- hearty
- honest
- impress
- ingenious
- ingenuous
- insincere
- level
- lineament
- oneself
- pious
- plain
- plausible
- poignant
- purehearted
- quasi-sincere
- real
- sea lion
- serious
- simple
- simple-hearted