faithful

== English == === Alternative forms === faithfull (archaic) === Etymology === From Middle English feithful, equivalent to faith +‎ -ful. === Pronunciation === IPA(key): /ˈfeɪθ.fl̩/ === Adjective === faithful (comparative more faithful, superlative most faithful) 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. (ring theory) Of a module, whose annihilator is zero. ==== Derived terms ==== ==== Translations ==== ==== See also ==== go to the wall for someone stand by true === Noun === faithful (plural faithfuls) (in the plural) The practicing members of a religion or followers of a cause. Someone or something that is faithful or reliable. === Further reading === “old faithful”, in Collins English Dictionary.