to provide more money to pay for an event, activity, or organization than is necessary

If we don't spend the entire budget, the government may decide that the program was overfunded.

Companies don't like to over-fund pension plans because there is no access to the money once it's inside a plan. 公司不喜欢过度资助养老金计划，因为一旦资金转入计划就无法再调动了。