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

And then there’s Hanse, who sincerely assumed he was brought on to be the preserver of tradition. —Brody Miller, New York Times, 6 Jan. 2026

It certainly can be deployed sincerely, yet it’s almost always accompanied by a good-natured, perhaps slightly exasperated, shake of the head. —Kaitlyn Yarborough, Southern Living, 3 Jan. 2026

The back support was there, and as someone who’s five eleven, that was sincerely appreciated. —Audrey Lee, Architectural Digest, 26 Dec. 2025

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

Word History

First Known Use

1560, in the meaning defined above

Rhymes for sincerely

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