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.

Articulate and sincere, he makes this journey worth taking even for those not devoted to cult documentaries.

From Los Angeles Times • Jun. 9, 2026

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

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

In a statement, Henley College said its "thoughts and sincere condolences are with the student's family and friends at this extremely difficult time".

From BBC • May 15, 2026

It’s just as likely that John, whom she likes more than anyone else, could turn out to be attractive and funny but not particularly sincere or smart at all.

From "Blink" by Malcolm Gladwell

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!