A translation philosophy that aims to render the meaning of the original text into natural, idiomatic target-language equivalents — thought-for-thought rather than word-for-word. Developed in its modern form by Eugene Nida (Toward a Science of Translating, 1964). Also called "functional equivalence." Examples: the NIV (moderately dynamic), the NLT (strongly dynamic), the CEV and GNT (very dynamic). The translator's goal is that the English reader experience the same message as the original reader, even if the specific words and structures differ.
The strength of dynamic equivalence: readability. It removes awkward Hebraisms and Greek syntax, presents idioms in natural English equivalents, and communicates the author's meaning in flowing prose. New believers, young readers, and ESL readers often find dynamic translations more accessible. Weaknesses: (1) Interpretive layer. All translation involves interpretation, but dynamic equivalence involves more of it. The translator is constantly deciding what the author meant and expressing that meaning in the target language — which means the reader is receiving the translator's interpretive decisions as much as the author's original words. (2) Loss of literary features. Wordplay, repetition, literary structure, and allusion often get smoothed away. (3) Doctrinal softening. Controversial or counterintuitive words (propitiation, sanctification, justification) sometimes get replaced with looser terms that lose theological precision. The rule of thumb: use dynamic translations for reading (rapid exposure to storyline, large-scale themes), and formal translations for study (careful attention to words, structure, and doctrine). A wise Christian owns both and reads them side by side. The attempt to create a single perfect translation has never succeeded; the wisdom is in the pairing.