(noun) cash register
a cashbox with an adding machine to register transactions; used in shops to add up the bill
an official written record of names or events or transactions
indicate a certain reading; of gauges and instruments
The thermometer showed thirteen degrees below zero; The gauge read `empty'
record in a public office or in a court of law
file for divorce; file a complaint
be aware of
Did you register any change when I pressed the button?
have one's name listed as a candidate for several parties