Any of various meters capable of some independent action or which incorporate a microprocessor; especially an electricity or (less commonly) gas meter capable of transmitting readings to a utility company at regular intervals.
Origin
1970s.
Definition of smart meter in US English:
smart meter
noun
Any of various meters capable of some independent action or which incorporate a microprocessor; especially an electricity or (less commonly) gas meter capable of transmitting readings to a utility company at regular intervals.