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.