Unlike the other people who have posted definitions that are ridiculous, do not have substantial backing, or are simply mis-informed, I will give the complete definition of what "pwned" means.
1. The origins of "pwned" are debated but there are two possible sources:
a. A prominent quake player mis spelled "owned" and the new word "pwned" was adopted by people who thought it was "1337".
b. A warcraft map designer misspelled "owned" and thus people started using "pwned" instead.
The definitions are as follows:
In video games:
1. Completely annihilated or dominated.
2. Perfectly owned, meaning the other player did not do any damage.
I pwned your head with my awp.
I just pwned your ass noob!
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