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

But it’s played sincerely, so the visual contrast just makes the connection feel clumsy, if not outright absurd. —Sarah Shachat, IndieWire, 23 Mar. 2026

But the few times they’re forced to play their hurt feelings sincerely are as forced as the moment when Grace zips her gory wedding gown back on before it’s even been washed. —Amy Nicholson, Los Angeles Times, 19 Mar. 2026

The 98th Academy Awards, which came at the end of what felt like a particularly never-ending cycle of discourse and prognostication, did a good job making plenty of room to celebrate both movies sincerely. —David Sims, The Atlantic, 16 Mar. 2026

My favorite part of the documentary is the first half, which really feels more sincerely like Our Brother, Hillel. —Daniel Fienberg, HollywoodReporter, 15 Mar. 2026

Word History

First Known Use

1560, in the meaning defined above

Rhymes for sincerely

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