This will be be last English Tip this year, they will restart on 15/1/19. Have a good holiday and a happy New Year!
Definition: to give an instruction to a computer to finish using software or the computer. (this phrasal verb has more than one meaning)
E.g.1: You have to wait until the computer closes down before you can turn it off.
E.g.2: When you have finished using the word processor, save your work and close the program down.
This phrasal verb can be separated. (E.g. 2)