Learn the origin, synonyms, examples, and usage of the word budget as a noun, verb, and adjective. Budget can mean a leather pouch, a financial plan, or a quantity of resources. Budget is the policy to be followed during the budget period for the attainment of specified organisational objectives. Definition of Budget According to CIMA Terminology, a budget is “A plan expressed in money. It is prepared and approved before the budget period and may show income, expenditure, and the capital to be employed.