zom ‧ bie /ˈzɒmbi $ ˈzɑːm-/ BrE AmE noun [countable]
[ Date: 1800-1900 ; Language: Kimbundu ; Origin: nzumbi 'spirit of a dead person' ]
1 . informal someone who moves very slowly and does not seem to be thinking about what they are doing, especially because they are very tired:
I walked around like a zombie for most of the day.
2 . a dead person whose body is made to move by magic, according to some African and Caribbean religions
3 . ( also zombie machine/computer ) a computer that someone has secretly gained control of and uses to do things such as send ↑ spam (=unwanted emails sent to a large number of people)