noun
: the second stage of alert (as for a threatened air attack or an approaching storm) during which emergency preparations are carried out according to plan ; also : the signal for this — compare red alert , white alert , yellow alert
noun
: the second stage of alert (as for a threatened air attack or an approaching storm) during which emergency preparations are carried out according to plan ; also : the signal for this — compare red alert , white alert , yellow alert
Webster's New International English Dictionary. Новый международный словарь английского языка Webster. 2012