An official list or record of names, events, or transactions. The school keeps a register of all its students.
A book or system for keeping such records. The hotel receptionist asked me to sign the guest register.
A machine used in shops to add up and record the cost of items purchased and to store money. The cashier rang up the sale on the cash register.
A particular range of voice or instrument, especially in music. The singer's voice was strong in the lower register.
A device that automatically records a quantity or number. The gas meter acts as a register of the amount of gas used.
Computing: a small, fast storage location within a CPU used to hold data temporarily during processing. The processor moves data from memory into a register before performing calculations.
Linguistics: the level of formality or stylistic variety used in speech or writing suited to a particular social situation. Academic articles are usually written in a formal register.