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

Wole returned his gaze, equally sincerely, but Sylvester jumped between them, grabbing Wole’s hand as their father let go. —David Wright Faladé, New Yorker, 28 Sep. 2025

In criticizing how some Republicans reacted to Charlie Kirk's death, Jimmy Kimmel alleged that conservatives were using Kirk's assassination for political advantage rather than mourning the conservative activist sincerely. —Amanda Castro, MSNBC Newsweek, 24 Sep. 2025

How to rebuild trust in a relationship The first steps to rebuilding trust in a relationship, Prabhu says, is for the partner who was hurt to express their pain to the partner who hurt them, and for the partner who hurt them to sincerely acknowledge and validate the hurt partner's feelings. —Hannah Yasharoff, USA Today, 15 Sep. 2025

Miller sincerely believes there’s a game for everyone. —Michael Deeds, Idaho Statesman, 11 Sep. 2025

Word History

First Known Use

1560, in the meaning defined above

Rhymes for sincerely

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