bifold

Meanings

1. Twofold, double.
2. Of two kinds.

1. A door, window, shutter, or divider consisting of two equal panels hinged together so that it opens by folding the panels against each other.
2. A sheet of paper or cardboard folded in half along a crease down the center.
3. A wallet, billfold, or carrying case with a single fold, so that it opens like a book.
4. A crease or turn that causes something to double back on itself.

Etymology

From bi- + -fold.