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[countdown]
{n.}. {Space English}, {informal} 1. A step-by-step process which leads to the
launching of a rocket.
Countdown starts at 23:00 hours tomorrow night and
continues for 24 hours.
2. Process of counting inversely during the acts leading
to a launch; liftoff occurs at zero.
3. The time immediately preceding an
important undertaking, borrowed from Space English.
We're leaving for
Hawaii tomorrow afternoon; this is countdown time for
us.
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