What Does "Mind the Gap" Mean?

Mind the Gap is heard in many places. The most obvious is probably the british guy saying "mind the gap" over the loudspeakers while people step out of the London subway (or the "T") and onto the platform. Most people don't know that it's also a very pure buddhist (and sort of hippie) term reffering to a void in time. Then again it could just be some boy with a big black gap in his teeth telling somebody to just ignore it. We don't even know how many meanings there are out there and were in the band so if you know something please comment and tell us. Also, we don't know how but keep a lookout for a band called "Sinus Rythm". The drummer is C. Bonham's cousin.