1DF a hard dry type of bread in small flat shapes, that is often eaten with cheese
2 also Christmas crackerDL a decorated paper tube that makes a small exploding sound when you pull it apart. Crackers contain a small gift, a paper hat, and a joke, and are used at Christmas in Britain.
3DL a firecracker
4 British English spoken something that is very good or funny :
That was a cracker of a goal.
That was a cracker of a goal.5TD someone who illegally breaks into a computer system in order to steal information or stop the system from working properly [= hacker]:
computer crackers
computer crackers6 British English old-fashioned informal a very attractive woman
WORD FOCUS: computer 
people who work with computers: user, programmer, web designer, IT person, software engineer, (systems) analyst, administrator, webmaster, helpdesk, techie informal, geek disapproving informal
someone who tries to break into a computer system: hacker, cracker
things you do with your computer: start up/power up your computer
open a file or document
enter information
click on an icon
cut and paste pieces of text
copy files or programs
scroll up and down the page
delete things you do not want
download files or pictures from the Internet
burn CDs or DVDs
close a file or document
save your work
shut down your computer
computer problems: bug, virus, error, corrupted file/data, crash, wormcomputer
➔ See also computer

people who work with computers: user, programmer, web designer, IT person, software engineer, (systems) analyst, administrator, webmaster, helpdesk, techie informal, geek disapproving informal
someone who tries to break into a computer system: hacker, cracker
things you do with your computer: start up/power up your computer
open a file or document
enter information
click on an icon
cut and paste pieces of text
copy files or programs
scroll up and down the page
delete things you do not want
download files or pictures from the Internet
burn CDs or DVDs
close a file or document
save your work
shut down your computer
computer problems: bug, virus, error, corrupted file/data, crash, wormcomputer
➔ See also computer

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