Adjective
1. steadfast in affection or allegiance;
"years of faithful service""faithful employees""we do not doubt that England has a faithful patriot in the Lord Chancellor"2. marked by fidelity to an original;
"a close translation""a faithful copy of the portrait""a faithful rendering of the observed facts"3. not having sexual relations with anyone except your husband or wife, or your boyfriend or girlfriend;
"he remained faithful to his wife"