[bind.er] n (bef. 12c) 1: a person or machine that binds something (as books)
2. a: something used in binding b: a usu. detachable cover (as for holding sheets of paper)
3: something (as tar or cement) that produces or promotes cohesion in loosely assembled substances
4: a temporary insurance contract that provides coverage until the policy is issued
5: something (as money) given in earnest; also: the agreement arrived at