The definition of delinquent is something improper or criminal in nature or something that is late in being done. An example of delinquent behavior is robbing a store. An example of delinquent is a credit card payment that should have been paid several months earlier.
Fire hydrant meters are a specialized type of portable turbine meter attached to a fire hydrant to measure water flowing out of the hydrant. The meters are normally made of aluminium to keep their weight low and usually have a 3 capacity.
A meter is a device that measures electrical quantities in your electronics projects. A multimeter, therefore, is a combination of several different types of meters all in one box. At the minimum, a multimeter combines three distinct types of meters (ammeter, voltmeter, and ohmmeter) into a single device.