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.

Altman isn’t the first billionaire who might do a big media deal for reasons other than sincere interest in media.

From Slate • Apr. 7, 2026

Though Amanda Peet has worked steadily in television in recent years, the sincere and urbane comedy “Fantasy Life” marks her first role in a movie since 2015.

From Los Angeles Times • Apr. 2, 2026

The organisation added it stands in full support of Woods and has "sincere hope for his strength, comfort, and recovery", and will share further updates on the future captaincy "when appropriate".

From BBC • Apr. 1, 2026

That’s what Auf der Maur’s roommate told her the night she came home after thinking that she had offered a sincere but thoughtful declination to the suggestion that she become the bass player in Hole.

From Salon • Mar. 24, 2026

“Three weeks,” Nathan’s reply, grave, sincere, absolutely honest where another might have been tempted to easier words.

From "Nectar in a Sieve" by Kamala Markandaya

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!