Meaning

(astronautics) A count backward in fixed units to the time of some event, especially the launch of a space vehicle..

Definitions by Sense

1. (astronautics) A count backward in fixed units to the time of some event, especially the launch of a space vehicle.
2. (astronautics) The acts of preparation carried out during this period.
3. (radio, television) A radio or television program counting down the top songs of a given week, usually in reverse order and ending with the number one song.
4. (nonstandard) To count down.

Example Sentences

This was accomplished in the old system by polling a software variable representing the number of prebleach bin and issuing a software command to trigger the AOM once the variable has countdowned to zero.

Time measures itself out in a series of diminishing peristaltic ticks, countdowning slowly towards the miracle of Ignition.

Whole families stood gawking at the massive statue, countdowning the five remaining minutes to the big one.

Word Forms

• countdowns
• count down
• count-down
• countdowning
• countdowned

Related Words

When Should You Use Countdown?

Use countdown when its meaning, tone and grammar fit the full sentence. A synonym is not always a direct replacement.

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