Meaning of “faithful” - Learner’s Dictionary

faithful

adjective uk us /ˈfeɪθfəl/
RELATIONSHIP

If your husband, wife, or partner is faithful, they do not have a sexual relationship with anyone else:

a faithful husband
They remained faithful to each other throughout their long marriage.
LOYAL

B2 always loyal:

his trusted and faithful servant
NOT CHANGED

not changing any of the original details, facts, style, etc:

Does the film adaptation stay faithful to the novel?
→ Opposite unfaithful
faithfulness noun [ U ]

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