binding

Universal Words adjective, noun adjective ~ (on / upon sb) that must be obeyed because it is accepted in law: a binding promise / agreement / contract * The decision is binding on both parties. * The judge said the document was not legally binding. noun 1 [C,U] the cover that holds the pages of a book together: rare books in leather bindings 2 [C,U] fabric that is fastened to the edge of sth to protect or decorate it 3 [C] a device on a ski that holds the heel and toe of your boot in place and releases the boot automatically if you fall