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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.

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

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

"You'd have to have a sincere commitment by both sides to make this work," he added.

From Barron's • Mar. 22, 2026

"I want to express my sincere appreciation to those affected - we are committed to supporting each individual with care, guidance and assistance throughout this transition," he added.

From BBC • Mar. 18, 2026

“Sorry ’bout that,” she says in a sincere voice.

From "Dragons in a Bag" by Zetta Elliott

From Roget's 21st Century Thesaurus, Third Edition Copyright © 2013 by the Philip Lief Group.