The quality of being honest; truthfulness, sincerity, and fair dealing. - Analysis, history, and the origins of the word The meaning of HONESTY is adherence to the facts : sincerity. How to use honesty in a sentence. Synonym Discussion of Honesty . Master the word " HONESTY " in English: definitions, translations, synonyms, pronunciations, examples, and grammar insights - all in one complete resource. Definition of honesty noun in Oxford Advanced Learner's Dictionary. Meaning, pronunciation, picture, example sentences, grammar, usage notes, synonyms and more.