from The American Heritage® Dictionary of the English Language, 4th Edition

  • adj. Not feigned or affected; genuine: sincere indignation.
  • adj. Being without hypocrisy or pretense; true: a sincere friend.
  • adj. Archaic Pure; unadulterated.

from Wiktionary, Creative Commons Attribution/Share-Alike License

  • adj. earnest; meaning what one says or does; truthful.
  • adj. meant truly or earnestly.

from the GNU version of the Collaborative International Dictionary of English

  • adj. Pure; unmixed; unadulterated.
  • adj. Whole; perfect; unhurt; uninjured.
  • adj. Being in reality what it appears to be; having a character which corresponds with the appearance; not falsely assumed; genuine; true; real.
  • adj. Honest; free from hypocrisy or dissimulation.

from The Century Dictionary and Cyclopedia

  • Sound; whole; unbroken; without error, defect, or injury.
  • Pure; unmixed; unadulterated; free from imitation; good throughout: as, sincere work.
  • Having no admixture; free; clear: followed by of.
  • Unalloyed or unadulterated by deceit or unfriendliness; free from pretense or falsehood; honestly felt, meant, or intended: as, a sincere wish; a sincere effort.
  • Free from duplicity or dissimulation; honest in speech or intention; guileless; truthful; frank.
  • Morally pure; undepraved; upright; virtuous; blameless.
  • Synonyms and Fair, Open, etc. (see candid); Cordial, Sincere, etc. (see hearty), unfeigned, undissembling, artless, heartfelt.

from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.

  • adj. characterized by a firm and humorless belief in the validity of your opinions
  • adj. open and genuine; not deceitful


Latin sincērus; see ker-2 in Indo-European roots.
(American Heritage® Dictionary of the English Language, Fourth Edition)
From Middle French sincère, from Latin sincerus ("genuine"), from Proto-Indo-European *sin- + *ker- (“grow”), from which also Ceres ("goddess of harvest") from which English cereal. (Wiktionary)


  • He is sincere, I am certain, _sincere_ even in his most despotic acts -- from a sense that that _is_ the _only_ way to govern ....

    Queen Victoria

  • He is stern and severe -- with fixed principles of _duty_ which _nothing_ on earth will make him change; very _clever_ I do _not_ think him, and his mind is an uncivilised one; his education has been neglected; politics and military concerns are the only things he takes great interest in; the arts and all softer occupations he is insensible to, but he is sincere, I am certain, _sincere_ even in his most despotic acts, from a sense that that _is_ the _only_ way to govern; he is not, I am sure, aware of the dreadful cases of individual misery which he so often causes, for I can see by various instances that he is kept in utter ignorance of

    The Letters of Queen Victoria, Vol 2 (of 3), 1844-1853 A Selection from her Majesty's correspondence between the years 1837 and 1861

  • In fact the word sincere literally means “without hypocrisy.”

    Living on the Edge

  • Katz is an independent creative that works with brands to develop what he calls sincere experiences for people.

    Piers Fawkes: Levi's Print Workshop In The Mission

  • What he is into is -- is a very sort of what he calls sincere, frank dialogue.

    CNN Transcript Nov 27, 2006

  • She looked at him, evidently judged his expression sincere, and sat back down.

    Say When

  • Napoleon, Burns, Cromwell, no man adequate to do anything, but is first of all in right earnest about it; what I call a sincere man.

    The Art of Public Speaking

  • How very few people are capable of what you call sincere heterodoxy, in morals or religion!

    Born in Exile

  • Mirabeau, Napoleon, Burns, Cromwell, no man adequate to do anything, but is first of all in right earnest about it; what I call a sincere man.

    Sartor Resartus, and On Heroes, Hero-Worship, and the Heroic in History

  • The priest spoke in low tones to the woman in the blue velvet pants suit, an expression of sincere sympathy on his rugged face.

    Etched in Bone

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