1 (used especially about a document) prepared in order to show the usual way of doing sth or to provide a standard method （尤指文件）作为说明或范例的，形式的: a pro-forma letter 书信范例pro-forma instructions 形式说明

2 (used about a document) sent in advance （指文件）提前发出的: a pro-forma invoice (= a document that gives details of the goods being sent to a customer) 估价发票 pro forma noun [C]: I enclose a pro forma for you to complete, sign and return. 内附一份形式发票，请你填好后签字发回。