fidelity

/fɪˈdɛlədi/

/fɪˈdɛlɪti/

Other forms: fidelities

Fidelity is the quality of being faithful or loyal. Dogs are famous for their fidelity.

Fidelity comes from the Latin root fides, which means faith, so fidelity is the state of being faithful. Marital fidelity is faithfulness to your spouse. If you're a journalist, your reports should have fidelity to the facts. Someone without fidelity to a religion or group belief is called an infidel.

Definitions of fidelity

1. noun

   the quality of being faithful
   synonyms: faithfulness

   antonyms:

   infidelity

   the quality of being unfaithful

   types:

   constancy

   faithfulness and dependability in personal attachments (especially sexual fidelity)

   dedication

   complete and wholehearted fidelity

   loyalty, trueness

   the quality of being loyal

   staunchness, steadfastness

   loyalty in the face of trouble and difficulty

   allegiance, fealty

   the loyalty that citizens owe to their country (or subjects to their sovereign)

   nationalism, patriotism

   love of country and willingness to sacrifice for it

   regionalism

   loyalty to the interests of a particular region

   type of:

   quality

   an essential and distinguishing attribute of something or someone
2. noun

   accuracy with which an electronic system reproduces the sound or image of its input signal
   type of:

   accuracy, truth

   the quality of being near to the true value