countdown [i k=untd+un ]     (순위: 33296 - 대졸 수준)   뜻  명) 초읽기, 카운트다운 Mean  The counting backward aloud from an arbitrary starting number to indicate the time remaining before an event or operation, such as the launching of a missile or space vehicle. 예문 1. begin the countdown (초읽기를 시작하다)