(in the plural) The practicing members of a religion or followers of a cause.
Someone or something that is faithful or reliable.
Loyal; adhering firmly to person or cause.
Having faith.
Reliable; worthy of trust.
Consistent with reality.
Engaging in sexual relations only with one's spouse or long-term sexual partner.
(mathematics) Injective in specific contexts, e.g. of representations in representation or functors in category theory.