- 1An act of counting numerals in reverse order to zero, especially before the launching of a rocket or missile: the missiles' launch crews would begin their final countdownMore example sentences
- In Florida today, NASA beginning its countdown for the first space shuttle launch since the Columbia disaster more than two years ago.
- A series of meetings will take place Thursday to discuss the problem and determine the steps necessary to get back into the launch countdown.
- Dr. Kraft worked to develop the countdown, launch, and flight procedures, as well as the design of Mission Control itself at the Cape and later in Houston.
- 1.1The period of time leading up to a significant event and the procedures carried out during this time: the countdown to your holidayMore example sentences
- As the countdown to war continues Britain can be expected to contribute at least 12,000 troops as well as RAF, Navy and Special Forces units.
- He was forced to redraft this advice as the countdown to war continued.
- We are fast approaching the countdown to our big event.
- 1.2A digital display that counts down: a key toggles the countdown on and offMore example sentences
- I will never employ any device with a digital countdown.
- I notice a digital countdown projected below the Napoleon-guy: 1.69, and quickly descending.
- A countdown is displayed over the grenade, and you see the exact trajectory it will take.
More definitions of countdownDefinition of countdown in:
- The US English dictionary