This simple word has led many people to misleading definitions and confused end of the day. All they end up thinking is - Its "bad" - all thanks to unclear explanations available on the internet. Actually, it's not!
Lol, I know most Script Kiddies tend to confuse people with all this. I would like to share my understanding of this word (after being into cyber security for more than 3 years now and working with some of the best brains under the sun).
Here I go - According to Jon Erickon, the author of Hacking - The Art of Exploitation, a hack is an intelligent solution to a problem. Hackers are people who use rules of computers to bypass a security mechanism (using these hacks or intelligent solutions) .
Using this intelligence to do something good or something "evil" is a decision an individual makes end of the day. I appreciate the brighter part (although the darker could be far more lucrative in terms of money :P)