Formal  adj. 1 in accordance with rules, convention, or ceremony (formal dress; formal occasion). 2 precise or symmetrical (formal garden). 3 prim or stiff. 4 perfunctory, in form only. 5 drawn up etc. Correctly; explicit (formal agreement). 6 of or concerned with (outward) form, not content or matter.  formally adv. [latin: related to *form]