Noun count down has 1 sense
  1. countdown - counting backward from an arbitrary number to indicate the time remaining before some event (such as launching a space vehicle)
    --1 is a kind of count, counting, numeration, enumeration, reckoning, tally
    Derived form: verb count down1
,Verb count down has 1 sense
  1. count down - count backwards; before detonating a bomb, for example
    --1 is one way to
    count
    Derived form: noun countdown1
    Sample sentence:
    Somebody ----s
,
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