faithful

American  

[feyth-fuhl] / ˈfeɪθ fəl /

adjective

1. true to one's word, promises, vows, etc.

2. steady in allegiance or affection; loyal; constant.

   faithful friends.

   Synonyms:

   staunch, devoted, true

3. reliable, trusted, or believed.

4. strict or thorough in the performance of duty.

   a faithful worker.

5. adhering or true to fact, a standard, or an original; accurate.

   a faithful account;

   a faithful copy.

   Synonyms:

   exact, precise

6. Obsolete. full of faith; believing.

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noun

1. the faithful,

   1. the believers, especially members of a Christian church or adherents of Islam.

   2. the body of loyal members of any party or group.

faithful British  

/ ˈfeɪθfʊl /

adjective

1. having faith; remaining true, constant, or loyal

2. maintaining sexual loyalty to one's lover or spouse

3. consistently reliable

   a faithful worker

4. reliable or truthful

   a faithful source

5. accurate in detail

   a faithful translation

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noun

1. 1. the believers in and loyal adherents of a religious faith, esp Christianity

   2. any group of loyal and steadfast followers

Synonym Usage

Faithful, constant, loyal imply qualities of stability, dependability, and devotion. Faithful implies long-continued and steadfast fidelity to whatever one is bound to by a pledge, duty, or obligation: a faithful friend. Constant suggests firmness and steadfastness in attachment: a constant affection. Loyal implies unswerving allegiance to a person, organization, cause, or idea: loyal to one's associates, one's country.

Other Word Forms

• faithfulness
  noun
• overfaithful
  adjective
• pseudofaithful
  adjective
• quasi-faithful
  adjective
• faithfully
  adverb

Etymology

Origin of faithful

First recorded in 1375–1425; see origin at faith, -ful

Explanation

Faithful describes someone who is reliable and consistent. If you're a faithful volunteer at the animal shelter, you show up every Saturday and work hard to help the animals. A faithful friend is loyal and steadfast — it's no wonder that many people consider their dogs to be their most faithful companions. Though faithful usually describes a person, you can also use it to talk about a particularly reliable object, like your faithful hiking boots. There's another sense of faithful that means "remaining true to," like faithful believers who pray and attend religious services regularly.

Example Sentences

See Examples For:

faithful

Price delivers “Oval Room” with the same steely, straight-ahead tone that Foley had, offering a very faithful reading of the original — but that’s not meant as an insult or a diminishment of Price’s approach.

From Salon ● Jul. 14, 2026

Had Greenspan remained faithful to the principles he articulated in 1966, his legacy might have been far different.

From The Wall Street Journal ● Jul. 10, 2026

Chromosomes do not carry a faithful memory of our ancestors’ social lives.

From Science Daily ● Jul. 7, 2026

The monument, showing the Duke on his faithful horse Copenhagen, was designed by the Italian artist Carlo Marochetti and erected in 1844 to commemorate his victory over Napoleon at the Battle of Waterloo.

From BBC ● Jul. 3, 2026

As with his food, my father is faithful to his wardrobe.

From "Me Talk Pretty One Day" by David Sedaris

Related Words

• affectionate
• ardent
• conscientious
• dependable
• devoted
• dutiful
• hard-core
• honest
• honorable
• loving
• obedient
• patriotic
• resolute
• scrupulous
• sincere
• staunch
• steadfast
• true
• trustworthy
• trusty