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Browse the Dictionary:: A; B; C; D; E; F; G; H; I; J; K; L; M; N; O; P; Q; R; S; T; U; V; W; X; Y; Z; #

zero hour

Entry Word:: zero hour
Function:: noun

Text: a time or state of affairs requiring prompt or decisive action<we're at the zero hour, so someone has to make a decision>— see emergency

Learn more about "zero hour" and related topics at Britannica.com

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