Fidelity
King James Dictionary [1]
FIDEL'ITY, n. L. fidelitas, from fides, faith, fido, to trust. See Faith.
1. Faithfulness careful and exact observance of duty, or performance of obligations. We expect fidelity in a public minister, in an agent or trustee, in a domestic servant, in a friend.
The best security for the fidelity of men, is to make interest coincide with duty.
2. Firm adherence to a person or party with which one is united, or to which one is bound loyalty as the fidelity of subjects to their king or government the fidelity of a tenant or liege to his lord. 3. Observance of the marriage covenant as the fidelity of a husband or wife. 4. Honesty veracity adherence to truth as the fidelity of a witness.
Vine's Expository Dictionary of NT Words [2]
"faith, faithfulness," is translated "fidelity" in Titus 2:10 . See Faith (b).
Webster's Dictionary [3]
(1): ( n.) Faithfulness; adherence to right; careful and exact observance of duty, or discharge of obligations.
(2): ( n.) Adherence to a person or party to which one is bound; loyalty.
(3): ( n.) Adherence to the marriage contract.
(4): ( n.) Adherence to truth; veracity; honesty.
Charles Buck Theological Dictionary [4]
Faithfulness, or the conscientious discharge of those duties of a religious, personal, and relative nature, which we are bound to perform.
See an excellent sermon on the subject in Dr. Erskine's Sermons, vol. 2: p. 304.