Definitions

sincere

[sin-seer] / sɪnˈsɪər /

ADJECTIVE

straightforward, honest

Synonyms

STRONGEST

candid earnest for real forthright genuine heartfelt outspoken real serious true trustworthy

WEAK

24-carat aboveboard actual artless bona fide dead-level dear devout faithful frank guileless honest-to-God honest-to-goodness like it is meant natural no-fooling no-nonsense on the level on the line on the up and up open plain pretensionless regular righteous saintly square sure-enough true-blue unaffected undesigning undissembled unfeigned unpretentious up-front wholehearted

Antonyms

STRONGEST

counterfeit deceitful devious dishonest false flippant insincere invalid untrustworthy

WEAK

tricky

Example Sentences

Examples are provided to illustrate real-world usage of words in context. Any opinions expressed do not reflect the views of Dictionary.com.

This is very often a mistake, so I put it to Ms. de Graaf: How sincere is Mr. Putin about any of this?

From The Wall Street Journal • Jun. 5, 2026

“The words I get from people are so sincere and so heartfelt, they’re not just fanboying or fangirling,” Brantley adds.

From Los Angeles Times • May 27, 2026

"I also take this opportunity to express my sincere gratitude to the government and people of India, the United States and all our supporters," he said.

From Barron's • May 27, 2026

"This is a heartbreaking incident and my sincere condolences go out to the young girl's loved ones," council leader George Finch said.

From BBC • May 26, 2026

“On a final note, the Oakland Police Department would like to extend a sincere apology to Morris Jeffries, Jr., for his treatment yesterday.”

From "Anger Is a Gift" by Mark Oshiro

Vocabulary lists containing sincere

The SAT: Words to Capture Tone, List 2

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ACT Reading Test: Words to Capture Tone, List 1

Interested in learning more words like this one? Our team at Vocabulary.com has got you covered! You can review flashcards, quiz yourself, practice spelling, and more – and it's all completely free to use!

The New SAT: Words to Capture Tone

Want to remember this word for good? Start your learning journey today with our library of interactive, themed word lists built by the experts at Vocabulary.com – we'll help you make the most of your study time!