Countdown

Alternative forms

 * count down
 * count-down

Noun

 * 1) A count backward in fixed units to the time of some event, especially the launch of a space vehicle
 * 2) The acts of preparation carried out during this period
 * 3)  A radio or television program counting down the top songs of a given week, usually in reverse order ending with the No. 1.

Verb

 * 1)  To count down