count down

English Thesaurus

1. count backwards; before detonating a bomb, for example (verb.communication)

hypernym	:	count,
definition	:	name or recite the numbers in ascending order (verb.communication)

derivation	:	countdown,
definition	:	counting backward from an arbitrary number to indicate the time remaining before some event (such as launching a space vehicle) (noun.act)

derivation	:	countdown,
definition	:	counting backward from an arbitrary number to indicate the time remaining before some event (such as launching a space vehicle) (noun.act)