hund·rad (hŭnd’răd) n. pl. hundrad or hundrads 1) One tenth of a k-rad. 2) A collaborative effort by active hacker-types, sometimes referred to as a “project”. 3) A participant in a hundrad. 4) hundrads Reference to multiple participants in hundrad: I caught up with some fellow hundrads at the con. or Reference to multiple projects of the hundrad: Which hundrads are you working on now? 5) Slang. A one-hundred-dollar bill: Dude, can you spot me a hundrad? adj. 1) A description of quality or quantity equivalent to one tenth of a k-rad: Holy SHIT, that was hundrad!