5, 4, 3, 2, 1, Liftoff
Puzzle 14 of Staying close Pack
Question
5, 4, 3, 2, 1, Liftoff
Answer
COUNTDOWN
Word Meaning:
COUNTDOWN — (astronautics) A count backward in fixed units to the time of some event, especially the launch of a space vehicle.
Definitions from Wiktionary.