noun
definition
(in the plural) The practicing members of a religion or followers of a cause.
example
The faithful pray five times a day.
definition
Someone or something that is faithful or reliable.
adjective
definition
Loyal; adhering firmly to person or cause.
example
My dog is a very faithful dog: he doesn't like to be petted by anybody else.
definition
Having faith.
definition
Reliable; worthy of trust.
example
My servant is very faithful.
definition
Consistent with reality.
example
I would consider that a very faithful reproduction.
definition
Engaging in sexual relations only with one's spouse or long-term sexual partner.
example
They had been faithful to each other all of their married life.
definition
(mathematics) Injective in specific contexts, e.g. of representations in representation or functors in category theory.