definition of
hacker

[1] #1 hacker n. someone who plays golf poorly. wn

[2] #2 hacker n. [cyber-terrorist, cyberpunk] a programmer who breaks into computer systems in order to steal or change or destroy information as a form of cyber-terrorism. wn

[3] #3 hacker n. a programmer for whom computing is its own reward; may enjoy the challenge of breaking into other computers but does no harm; "true hackers subscribe to a code of ethics and look down upon crackers". wn

[4] #4 hacker n. [hack, drudge] one who works hard at boring tasks. wn