superl pure; unmixed; unadulterated.
2. sincere ·superl whole; perfect; unhurt; uninjured.
3. sincere ·superl honest; free from hypocrisy or dissimulation; as, a sincere friend; a sincere person.
4. sincere ·superl being in reality what it appears to be; having a character which corresponds with the appearance; not falsely assumed; genuine; true; real; as, a sincere desire for knowledge; a sincere contempt for meanness.