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

While this legal case will not bring Brian back, his family sincerely hopes that meaningful change will be introduced so that this cannot happen again. —Erin Clack, PEOPLE, 21 Dec. 2025

Strazza will play Patty, the undergraduate assistant to Laurie’s Neville, a British professor who sincerely loves archaeology. —Peter White, Deadline, 17 Dec. 2025

Of course, the public may also have an interest in spotting the object that many sincerely believe could be an alien spaceship. —Eric Lagatta, USA Today, 16 Dec. 2025

Even simple gestures like dropping a warm drink off to a friend or sincerely thanking a retail worker can boost mood and increase feelings of social connection. —Jennifer Moss, CNBC, 10 Dec. 2025

Word History

First Known Use

1560, in the meaning defined above

Rhymes for sincerely

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