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.

Ana Milagros, 64, who was waving a Vatican flag, said she thought the US-born pope seemed "approachable" and "very sincere".

From Barron's • Jun. 7, 2026

In their joint statement, West Hollywood and the WeHo Pride team expressed their appreciation for “the respectful and sincere dialogue” around both the event and the “role and significance” of Pride honorees.

From Los Angeles Times • Jun. 4, 2026

"I am deeply sorry to hear this tragic news and send my sincere condolences to his family."

From BBC • May 23, 2026

Rossini’s devotion, undoubtedly sincere, was never permitted to cloud his humor.

From The Wall Street Journal • May 15, 2026

“Really, genuinely kind. Possibly the most sincere and wonderful boy ever. And Lorren already did the detective work, so I know he’s not a creepy grown-up. He’s thirteen. Like me.”

From "Bye Forever, I Guess" by Jodi Meadows

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!