pro forma adjective 3adverb 1noun 1forms 1 adjective3 •Occurring, undertaken, or performed as a perfunctory matter, in the interest of form, or for the sake of formality. •Of or relating to a document of form, especially an invoice sent in advance. •Showing projected costs, liabilities, etc., especially as a result of an expected action or situation. (of a financial document) adverb1 •Undertaken or performed as a perfunctory matter, in the interest of form, or for the sake of politeness.He greeted her pro forma. noun1 •A document that shows the standard entries of a form or similar document. formspro formas