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

• genuinely
• openly
• honestly
• naively
• naïvely
• naturally
• freely
• simply

Examples of sincerely in a Sentence

thanked them sincerely for their help

Recent Examples on the Web

These simple acts, such as returning calls, remembering important details, showing up when promised and apologizing sincerely, reinforce the unspoken message of security and reassurance that no one is leaving each other’s side. —Mark Travers, Forbes.com, 18 Aug. 2025

The back support was there, and as someone who’s five eleven, that was sincerely appreciated. —Audrey Lee, Architectural Digest, 1 Aug. 2025

This, to me, is sincerely one of the greatest places that anyone could visit. —Eve Chen, USA Today, 19 July 2025

The crucial element isn't avoiding errors, which is impossible, but rather owning them, apologizing sincerely, and committing to improvement. —Julie Kratz, Forbes.com, 13 July 2025

Word History

First Known Use

1560, in the meaning defined above

Rhymes for sincerely

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