semiformal UK /ˌsɛmɪˈfɔːml/US /ˌsɛˌmaɪˈfɔrm(ə)l/adjective 3noun 1forms 1 adjective3 •Somewhat formal. •Of clothing: having a level of formality between that of informal and formal wear.Suits have largely replaced guayabera shirts as business and semiformal wear for middle and upper-class Panamanian men, made practical by the widespread use of air-conditioning in the cities. — 2005 •Of an event: having a semiformal dress code. noun1 •(US, Canada) A social event in which one is expected to dress in semiformal wear. formssemiformals
