A count backward in fixed units to the time of some event, especially the launch of a space vehicle.
A radio or television program counting down the top songs of a given week, usually in reverse order ending with the No. 1.
The acts of preparation carried out during this period.
To count down.
A critical moment in time.
A place where things join, a junction.
The manner of moving (transition) or mode of relationship between two consecutive sounds; a suprasegmental phonemic cue, by which a listener can distinguish between two otherwise identical sequences of sounds that have different meanings.