Definition of countdown
English to English noun - counting backward from an arbitrary number to indicate the time remaining before some event (such as launching a space vehicle)
source: WordNet 3.0
Visual Synonyms 
Nearby Word
countdown, count down, count on, county town, condone, conation, comedown, condom, canton, come down, contadino, content, cynodon, contain, count noun, cantion, contend, condemn, contemn, cantoon
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