countdown

noun

count·​down ˈkau̇nt-ˌdau̇n 

: an audible backward counting in fixed units (such as seconds) from an arbitrary starting number to mark the time remaining before an event

also : preparations carried on during such a count

count down

ˈkau̇nt-ˈdau̇n 

intransitive verb

Examples of countdown in a Sentence

Recent Examples on the Web

Today's wet dress rehearsal, which involves fully fueling Starship on the launch pad for a full countdown simulation run, is expected to wrap up later this morning. — Josh Dinner, Space.com, 24 Sep. 2026

The countdown calendars include a classic chocolate option, a box full of beauty gifts and a 12-day advent calendar loaded with looks for your lips. — Tim Chan, Footwear News, 23 Sep. 2026

In the days since, a countdown has been featured on her website. — Angie Martoccio, Rolling Stone, 23 Sep. 2026

The countdown came after Swift's team seemingly added a third page to the letter Swift wrote to fans after buying back her life's work in May 2025. — Lauryn Overhultz, FOXNews.com, 22 Sep. 2026

Word History

First Known Use

circa 1952, in the meaning defined above

Rhymes for countdown

• adown
• blowdown
• breakdown
• crackdown
• crosstown
• downtown
• drawdown
• dropdown
• facedown
• godown
• hometown
• knockdown

Kids Definition

countdown

noun

count·​down ˈkau̇nt-ˌdau̇n 

: the process of counting off backward in fixed units (as seconds) the time remaining before an event (as the launching of a rocket)