register

/ˈrɛdʒɪstər/
noun
  1. An official list or record of names, items, or events.
    • Please sign the guest register at the front desk.
    • The hotel keeps a register of all guests.
    • The teacher checked the attendance register every morning.
  2. The range of a voice or musical instrument.
    • Her voice moved smoothly between different registers.
    • He played the melody in the lower register of the piano.
    • The singer has an impressive high register.
  3. A style of language used in a particular situation or context.
    • Formal register is used in academic writing.
    • She switched to a casual register when talking to her friends.
    • The lawyer used a legal register during the trial.
  4. A device that records data, such as a cash register.
    • The store uses a digital register for all transactions.
    • The cashier rang up the items on the register.
    • He opened the register to give the customer change.
verb
  1. To record or enter in an official list or system.
    • You must register your car with the DMV every year.
    • She needs to register for the conference before Friday.
    • The couple decided to register their marriage at city hall.
  2. To show or express a feeling or opinion, often through facial expression or action.
    • She didn't register any emotion during the speech.
    • The survey registered strong support for the new policy.
    • His face registered surprise when he heard the news.
  3. To be noticed or understood by someone.
    • The importance of the event finally registered with the audience.
    • The warning didn't register with him until it was too late.
    • It took a moment for the joke to register in her mind.
  4. To achieve a particular measurement or reading on a device.
    • The speedometer registered 80 miles per hour.
    • The thermometer registered 100 degrees Fahrenheit today.
    • The earthquake registered 6.2 on the Richter scale.