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

Task is especially generous with its children and teens, allowing their faces to take up the frame, as Ruffalo’s and Pelphrey’s do, and their yearnings and fears to be voiced honestly and sincerely, as Tom’s and Robbie’s are. —Roxana Hadadi, Vulture, 5 Sep. 2025

The woman has sincerely held Pentecostal Christian beliefs and practices the religion of Free Holiness, the complaint notes. —Julia Marnin, Miami Herald, 27 Aug. 2025

But the show fills the space left by that absence by reckoning, deeply and sincerely, with everything else Judaism is. —Alison Herman, Variety, 22 Aug. 2025

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

Word History

First Known Use

1560, in the meaning defined above

Rhymes for sincerely

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