Noah Webster's Dictionary 1. (a.) Not being in truth what one appears to be; not sincere; dissembling; hypocritical; disingenuous; deceitful; false; -- said of persons; also of speech, thought; etc.; as, insincere declarations. 2. (a.) Disappointing; imperfect; unsound.

Multi-Version Concordance Insincere (2 Occurrences) 2 Corinthians 13:5 Test yourselves to discover whether you are true believers: put your own selves under examination. Or do you not know that Jesus Christ is within you, unless you are insincere? (WEY) 2 Corinthians 13:6 But I trust that you will recognize that we are not insincere. (WEY)