Definition of: register

(rej′is·tər) noun
1. An official record, the book containing it, or an entry therein; roll; list; schedule; a registry.
2. A registrar.
3. That which registers; a registering apparatus, as for recording velocity, pressure, etc.
4. A device for regulating the admission of heated air to a room.
5. A machine or apparatus which automatically records cash intake; a cash register.
6. Music a The range or compass of a voice or musical instrument, b A class or series of tones of a particular quality or belonging to a particular portion of the compass of a voice or of some instruments. The normal and natural register of the voice is the chest, or thick, register; a middle and an upper register are also recognized, the latter being also termed a head, or thin, register.
7. Phot. Relation of position between the sensitive plate or film and the focusing screen.
8. Printing a Exact correspondence of the lines and margins on the opposite sides of a printed sheet. b Correct relation of the colors in color printing. See synonyms under HISTORY, RECORD.
—v.t.
1. To enter in or as in a register; enrol; specifically, to record formally, as a document, securities, etc.
2. To indicate on a scale.
3. To express or indicate: His face registered his disapproval.
4. To effect the exact correspondence of (parts), as the two sides of a printed sheet, the separate plates or films of a color print, etc.
5. To cause (mail) to be recorded, on payment of a fee, when deposited with the postal system, so as to insure delivery.
—v.i.
6. To enter one's name in a register, poll, etc.
7. To have effect; make an impression.
8. Printing To be in register. See synonyms under ENROL. [<OF registre <Med. L registrum <L regesta records, neut. pl of regestus, pp. of regerere record <re- back + gerere carry]
—reg·is·tra·ble (rej′is·trə·bəl) adjective