set down as a rule or guide being in accord with established forms and conventions and requirements (as e.g. of formal dress) Synonyms for PRESCRIBED: expected, foreseen, fixed, predetermined, predictable, destined, calculated, inevitable; Antonyms of PRESCRIBED: incidental, chance. 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. The meaning of PRESCRIBE is to lay down a rule : dictate. How to use prescribe in a sentence. 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. PRESCRIBED definition: dictated or indicated as a rule or course of action to be followed. See examples of prescribed used in a sentence. 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. PRESCRIBE definition: 1. (of a doctor) to say what medical treatment someone should have: 2. to tell someone what they…. Learn more. 2 meanings: 1. recommended by a doctor 2. laid down or recommended formally. Click for more definitions. 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.