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.

Some see his concerns coming from a sincere sense of what’s at stake from technology that could rank up there with the development of electricity or the steam engine in terms of social upheaval.

From The Wall Street Journal • Jun. 20, 2026

"I feel great freedom and sincere trust from Ancelotti. He is sure I can do for the national team what I do for Real Madrid," he added.

From BBC • Jun. 14, 2026

Where does a sincere speaker using a medium with a motive fall?

From Slate • Jun. 12, 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

She glanced up at Mrs. Richardson, who for the first time realized how very big and sincere Pearl’s eyes were.

From "Little Fires Everywhere" by Celeste Ng

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!