Found 2 items, similar to cold wave.
English → English (WordNet) Definition: cold wave cold wave n : a wave of unusually cold weather
English → English (gcide) Definition: Cold wave Cold wave \Cold“ wave”\ (Meteor.) In the terminology of the United States Weather Bureau, an unusual fall in temperature, to or below the freezing point, exceeding 16[deg] in twenty-four hours or 20[deg] in thirty-six hours, independent of the diurnal range. [Webster 1913 Suppl.]