a set of things to do in order to achieve something, especially one that has been considered in detail in advance plan (for something) Both sides agreed to a detailed plan for keeping the peace. plan (to do something) The government has announced plans to create one million new training places. a development/business/peace, etc. plan a five-point plan a three-year plan We need to make plans for the future. a plan of action/campaign Let's hope everything will go according to plan.