binding
1. bind.ing \'bi-n-din\ n 1: the action of one that binds 2: a material or device used to bind : as 2a: the cover and fastenings of a book 2b: a narrow fabric used to finish raw edges 2c: a set of ski fastenings for holding the toe of the boot firm on the ski 2. binding \-din-le-\ aj 1: that binds 2: imposing an obligation - bind.ing.ly av