1 an act of counting backwards to zero, esp. before sending a spacecraft into space or before the start of an important event: --
The countdown sequence to the firing could not continue until it was established that all personnel were at a safe location.
During that period of countdown, the stress on every man, woman and child in these islands will be absolutely tremendous.
The warning comes as the countdown to 1992 reduces the room for any serious preparation to be carried out.
A week later, at the end of one of the countdowns, another video was posted, 06, carrying footage of the band's sound check and setting up for the show.
The hours before the drop are preceded by hourly countdowns for the arrival of the new year in other countries, along with live music performances by popular musicians.
Quite often milestone home runs such as round hundred and career records are considered breaking news, and sports news services give coverage to countdowns on impending milestone home runs.
Often, they will show video countdowns.
Depending on the type of vehicle used, countdowns can start from 72 to 96 hours before launch time.
