noun

The countdown clock ticked lower and lower as the anticipation in the room grew higher and higher. Finally, the moment arrived and the engines roared to life, jolting the spacecraft as it began to ascend towards the heavens. With a thunderous roar, the spacecraft blasted off, leaving a trail of smoke and fire in its wake. As it slowly disappeared into the night sky, cheers erupted from the crowd watching on, marking the successful start of the mission.

Example

1. The rockets engines roared as they prepared for blast-off.
2. The countdown began, the children cheering with excitement as they neared blast-off.
3. The astronauts were ready for blast-off and the mission to the moon.