Noun

1. An official written record of names or events or transactions
2. (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
3. A book in which names and transactions are listed
4. (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
5. An air passage (usually in the floor or a wall of a room) for admitting or excluding heated air from the room
6. A regulator (as a sliding plate) for regulating the flow of air into a furnace or other heating device
7. A cashbox with an adding machine to register transactions; used in shops to add up the bill

Verb

1. Record in writing; enter into a book of names or events or transactions
2. Record in a public office or in a court of law
3. Enroll to vote
4. Be aware of
5. Indicate a certain reading; of gauges and instruments
6. Have one's name listed as a candidate for several parties
7. Show in one's face
8. Manipulate the registers of an organ
9. Send by registered mail
10. Enter into someone's consciousness