The engineers monitored the countdown from the launch control room, nerves taut as the clock ticked toward liftoff.

We countdown to midnight every New Year's Eve, shouting together as the clock strikes twelve.

She was countdowning the final seconds aloud so everyone would know when to start.

We countdowned the days until the festival, marking each one with a small paper lantern.

The team set multiple synchronized countdowns before the rocket launch.