to put a name or information on an official list
You must register your name to vote.
to show your opinion officially
They voted to register their disagreement.
to show or record a measurement
The thermometer will register the temperature.
to show a feeling on your face
His face will register surprise when he hears.
to notice or be noticed
Did he register that you were there?
to send mail with extra protection
Please register this letter for safety.
an official list of names or information
Please sign the hotel register when you arrive.
the range of a voice or instrument
She sings in a high register.
the style of language used
The book uses a formal register.
an opening for air in a heating system
Open the register to let warm air in.
a machine for money in a shop
The cashier uses the register to take payments.