PRESCRIBED definition: 1. set by a rule or order: 2. decided by a doctor as treatment: 3. set by a rule or order. Learn more. set down as a rule or guide being in accord with established forms and conventions and requirements (as e.g. of formal dress) Define prescribed. prescribed synonyms, prescribed pronunciation, prescribed translation, English dictionary definition of prescribed. v. pre·scribed , pre·scrib·ing , pre·scribes v. tr. 1. To set down as a rule, law, or direction: prescribed the terms of the surrender. 2. To order the use. prescribed (comparative more , superlative most ) Of a procedure, specified to a great degree of detail; established as following a strict procedure or set of rules. PRESCRIBED definition: dictated or indicated as a rule or course of action to be followed. See examples of prescribed used in a sentence. 2 meanings: 1. recommended by a doctor 2. laid down or recommended formally. Click for more definitions. PRESCRIBE definition: 1. (of a doctor) to say what medical treatment someone should have: 2. to tell someone what they…. Learn more. The meaning of PRESCRIBE is to lay down a rule : dictate. How to use prescribe in a sentence. Synonyms for PRESCRIBED: expected, foreseen, fixed, predetermined, predictable, destined, calculated, inevitable; Antonyms of PRESCRIBED: incidental, chance. PRESCRIBE definition: to lay down, in writing or otherwise, as a rule or a course of action to be followed; appoint, ordain, or enjoin. See examples of prescribe used in a sentence.