a regulator (as a sliding plate) for regulating the flow of air into a furnace or other heating device
an air passage (usually in the floor or a wall of a room) for admitting or excluding heated air from the room
(computer science) memory device that is the part of computer memory that has a specific address and that is used to hold information of a specific kind
(music) the timbre that is characteristic of a certain range and manner of production of the human voice or of different pipe organ stops or of different musical instruments
an official written record of names or events or transactions
a book in which names and transactions are listed
enter into someone's consciousness; "Did this event register in your parents' minds?"
send by registered mail; "I'd like to register this letter"
manipulate the registers of an organ
show in one's face; "Her surprise did not register"
enroll to vote; "register for an election"
record in writing; enter into a book of names or events or transactions