trifold noun 3adjective 2forms 1 noun3 •Any sheet of paper or cardboard, folded into three sections along two parallel creases and used to present information, typically as a brochure or display board.Are saddlestitched double-fold brochures more effective than simple trifolds? — 1993 •A wallet with three equal-sized sections that fold together.Trifolds and credit card hip wallets have been interchangeably in the second slot for several seasons, and this Christmas it appeared that trifold sales edged ahead by a nose. — 1976 •Anything folded into thirds to resemble a trifold.Three plywood portable trifolds covered with burlap were assembled with hinges to divide the room at the pleasure of the displayers. — 1974 adjective2 •threefold •Of a mirror: having three reflective surfaces hinged together. formstrifolds
