A period during which the average daily rainfall does not exceed a certain minimum (originally ¼ inch over 28 days, now one-hundredth of an inch or 0.2 mm over 29 days).
Origin
Late 19th century.
Definition of partial drought in US English:
partial drought
noun
Meteorology
A period during which the average daily rainfall does not exceed a certain minimum (originally ¼ inch over 28 days, now one-hundredth of an inch or 0.2 mm over 29 days).