A period of at least 15 (originally †14) consecutive days in which the rainfall does not exceed one hundredth of an inch (originally, †in which there is no rainfall).
Origin
Late 19th century.
Definition of absolute drought in US English:
absolute drought
noun
Meteorology rare
A period of at least 15 (originally †14) consecutive days in which the rainfall does not exceed one hundredth of an inch (originally, †in which there is no rainfall).