Definitions
1.noun(in the plural) The practicing members of a religion or followers of a cause."The faithful pray five times a day."
2.nounSomeone or something that is faithful or reliable.
3.adjectiveLoyal; adhering firmly to person or cause."My dog is a very faithful dog: he doesn't like to be petted by anybody else."
4.adjectiveHaving faith.
5.adjectiveReliable; worthy of trust."My servant is very faithful."
6.adjectiveConsistent with reality."I would consider that a very faithful reproduction."
7.adjectiveEngaging in sexual relations only with one's spouse or long-term sexual partner."They had been faithful to each other all of their married life."
8.adjective(mathematics) Injective in specific contexts, e.g. of representations in representation or functors in category theory.