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.

Michael Sincere is the author of several books, including “Understanding Stocks,” “Understanding Options” and “Help Your Child Build Wealth.”

From MarketWatch • Jan. 21, 2026

Sincere and grindingly predictable, this particular journey mixes tears and reams of dialogue, accusations and confessions with the usual roadside attractions, including a convenience store, a quirky motel and some lightly offbeat American types.

From New York Times • Feb. 14, 2024

"Sincere or not, Team Jordan’s 'good cop/bad cop' routine is smart," he added.

From Salon • Oct. 17, 2023

Sincere thank-yous as we left, can’t wait to go back.

From Los Angeles Times • May 27, 2023

Sincere or not, would Welles’s performance save his radio program...and his career?

From "Spooked!" by Gail Jarrow

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

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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!