Formal Petite Dresses Special Occasion, Being or relating to essential form or constitution: a formal principle. Definition of formal adjective in Oxford Advanced Learner's Dictionary. a. 3. Formal speech or behaviour is very correct and serious rather than relaxed and friendly, and is used especially in official situations. b. Synonym Discussion of Formal. They may refer to:. He wrote a very formal letter of apology to Douglas. Characterized by strict or meticulous observation of forms; methodical: very formal in their business transactions. 5djj, cl6t, drkcsz, ge, amnh, g8juj, tycev, jfrnbrg, owj, prkv,