n.
      - an official list or record. 
▸a record of attendance, for example of pupils in a class.
 - a particular part of the range of a voice or instrument. 
▸a set of organ pipes which share a tonal quality.
 ▸a sliding device controlling such a set of organ pipes.
 - a variety of a language determined by degree of formality and choice of vocabulary, pronunciation, and syntax.
 - Printing  & Photography  the exact correspondence of the position of colour components in a printed positive. 
▸Printing  the exact correspondence of the position of printed matter on the two sides of a leaf.
 - (in electronic devices) a location in a store of data, used for a specific purpose and with quick access time.
 - an adjustable plate for widening or narrowing an opening and regulating a draught, especially in a fire grate.
 
v.
      - enter in or place on a register. 
▸put one's name on a register, especially as an eligible voter or as a guest in a hotel.
 - express (an opinion or emotion). 
▸(of an emotion) show in a person's face or gestures.
 ▸
[
usu. with neg.]
 become aware of:
 he hadn't even registered her presence.
 - (of an instrument) detect and show (a reading) automatically. 
▸(of an event) give rise to a specified reading on an instrument.
 - achieve (a certain score or result).
 - entrust (a letter or parcel) to a post office for transmission by registered post.
 - Printing  & Photography  correspond exactly in position.
 
 
  Derivative
  
  Etymology
  ME: from OFr. regestre or med. L. regestrum, registrum, alt. of regestum, sing. of late L. regesta ‘things recorded’, from regerere ‘enter, record’.