bifold noun 4adjective 2forms 1 noun4 •A door, window, shutter, or divider consisting of two equal panels hinged together so that it opens by folding the panels against each other.Wood-finished insulative shutters set as bifolds at the window. — 1989 •A wallet, billfold, or carrying case with a single fold, so that it opens like a book.A 1996 survey showed that men under age 20 buy three times as many trifolds as bifolds. So a trifold wallet becomes a habit, even after it has expanded to the size and shape of a jumbo bar of soap. — 1998 •A sheet of paper or cardboard folded in half along a crease down the center.AFSl is made up of thirteen bifolds, or fifty-two pages (each unfolded folio measuring 13.5 x 21 inches), beginning with the title page and continuing for fifty-one numbered pages. — 2006 •A crease or turn that causes something to double back on itself.I want to learn how to play, and that's all puzzles and problems, and what do I care when I go to play a game about parallels and bifolds? — 1898 adjective2 •Twofold, double. •Of two kinds. formsbifolds
