Meaning of “faithful” in the English Dictionary

"faithful" in English

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uk /ˈfeɪθ.fəl/ us /ˈfeɪθ.fəl/

faithful adjective (LOYAL)

B2 firm and not changing in your friendship with or support for a person or an organization, or in your belief in your principles:

a faithful friend
They are faithful supporters of the Labour Party.
His faithful old dog accompanied him everywhere he went.

C2 If your husband, wife, or partner is faithful, he or she does not have a sexual relationship with anyone else:

Was your wife faithful during your marriage?
He was faithful to his wife throughout their 30-year marriage.
remain faithful to sth

to continue to support or follow something:

He remained faithful to the regime when so many others spoke out against it.
Despite persecution, she remained faithful to her beliefs.

More examples

faithfulnoun [ C ]

uk /ˈfeɪθ.fəl/ us /ˈfeɪθ.fəl/

faithfulnoun [ plural ]

uk /ˈfeɪθ.fəl/ us /ˈfeɪθ.fəl/

(Definition of “faithful” from the Cambridge Advanced Learner’s Dictionary & Thesaurus © Cambridge University Press)

"faithful" in American English

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us /ˈfeɪθ·fəl/

trusted; loyal:

She has been a faithful employee for 30 years.

If something, such as a copy or recording, is faithful, it is exactly like or very similar to the original:

The painting was a faithful reproduction of the original.

If you are faithful to someone or something, you remain loyal and keep the promises you made:

You've been faithful to your family.

(Definition of “faithful” from the Cambridge Academic Content Dictionary © Cambridge University Press)