“Time-lapse” is a cinematography technique whereby the frequency at which film frames are captured (the frame rate) is much lower than that which will be used to play the sequence back.
When replayed at normal speed, time appears to be moving faster and thus lapsing. For example, an image of a scene may be captured once every second, and then played back at 30 frames per second; the result would be an apparent increase of speed by 30 times.
Time-lapse photography can be considered to be the opposite of high speed photography.
above example (and pleeeease, if you’ll watch it, put quality to 1080p HD and fullcreen)