sincerer; sincerest
1
: having or showing true feelings that are expressed in an honest way
He sounded sincere in his promises.
She seemed sincere in her commitment to finish school.
2
: genuine or real : not false, fake, or pretended
She has a sincere interest in painting.
He showed a sincere concern for her health.
Her apology was sincere.
He made a sincere attempt/effort to quit smoking.
Please accept our sincere thanks.
Cite this Entry
“Sincere.” Merriam-Webster.com Simple Definition, Merriam-Webster, https://www.merriam-webster.com/simple/sincere. Accessed 21 Jun. 2026.
Copy Citation
