binder
bind.er \'bi-n-d*r\ n 1: a person that binds something (as books) 2a: something used in binding 2b: a detachable cover or other device for holding together sheets of paper or similar material 2c: the sheet of tobacco that binds the filler in a cigar 3: something that produces or promotes cohesion in loosely assembled substa nces 4: a receipt for money paid to secure the right to purchase real estate upo n agreed terms; also : the money itself