pro for·ma \(ˈ)prō|fȯrmə\adjective Etymology: Latin 1.: for the sake of form : as a matter of form < eleven years of strictly pro forma equality — George Bailey > 2.: set up in advance to prescribe form or describe items < a pro forma financial statement > 3.: consisting of a memorandum invoice sent to a customer for his use or as a notice prior to actual shipment of goods < a pro forma invoice for customs >