sincerely

adverb

sin·​cere·​ly sin-ˈsir-lē 

sən-

: in a sincere or truthful way : with truth, genuineness, or straightforwardness

apologizing sincerely

I am sincerely sorry for your loss.

George Clooney, a pleasant man, tries sincerely to give some credibility to Kelvin, and if he doesn't earn our belief, at least he has our sympathy.

—Stanley Kauffman

The room was quiet until a student in the back of the room let out an enormous belch and said, not too sincerely, "Sorry."

—E. L. Konigsburg

—often used as a complimentary close with or without yours

… Thank you for your attention to this matter. Sincerely, Robert Brown

… Sincerely yours, John Smith

… Yours sincerely, Jane Doe

Synonyms of sincerely

• genuinely
• openly
• honestly
• naively
• simply
• naturally

Examples of sincerely in a Sentence

thanked them sincerely for their help

Recent Examples on the Web

Museums are sincerely trying to connect with their publics (even if these are often cast as consumers), and the horizon for that experiment is almost limitless. —Katy Siegel, Artforum, 2 June 2026

Instead, quietly locate the host, thank them sincerely, say your goodbyes, and head out. —Jamie Cuccinelli, Martha Stewart, 2 June 2026

Of that bunch, only Ejae can sincerely be counted as a solo female K-pop artist. —Hugh McIntyre, Forbes.com, 1 June 2026

Can top personnel executive Eliot Wolf, coach Mike Vrabel and offensive coordinator Josh McDaniels — who have each experienced the fallouts of the NFL’s win-or-be-fired stakes — sincerely make Brown’s desires a top priority? —Brooks Kubena, New York Times, 1 June 2026

Word History

First Known Use

1560, in the meaning defined above

Rhymes for sincerely

• cavalierly
• austerely
• severely
• clearly
• dearly
• merely
• nearly
• queerly
• yearly