What does it mean by bleaching your hair!?

I want to bleach my black hair a different hair color!!! HOW CAN I DO THAT? do i use lemon or whatever? OR do i use sumthing like clorox bleach? Shud i put clorox bleach (for clothes) in my hair and see wat it dus? :) im confused..i wanna make my hair lighter and not BLACK! :) thanks~ PS- yes im asian :P