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

Cady, claiming no hard feelings, insinuates himself into their world, apparently friendly, apparently helpful, so that it’s not always clear what’s sincere and what’s strategy.

From Los Angeles Times • Jun. 4, 2026

Even so, “The Late Show with Stephen Colbert” was and is sincere and wholesome, even moving at times.

From Salon • May 21, 2026

Barry Smith KC, for Ensco, offered the "sincere condolences" of the company for what had happened.

From BBC • May 18, 2026

A few weeks after it is shipped, he receives a letter from Mr. Barris, offering his sincere thanks and marveling at the ingenuity of it.

From "The Night Circus" by Erin Morgenstern

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!