tropical depression
noun Meteorology.
an atmospheric low-pressure system originating in the tropics, specifically, a tropical cyclone in which the maximum sustained wind speed is 38 miles per hour (62 kilometers per hour) or less.
Origin of tropical depression
1845–50;
tropical +
depression (in the sense “(low atmospheric pressure”)
Words nearby tropical depression
British Dictionary definitions for tropical depression
tropical depression
noun
Caribbean
an area of heavy rains and winds, the first stage in the development of a possible hurricane
Scientific definitions for tropical depression
tropical depression
A tropical cyclone having sustained surface winds less than 39 mi (63 km) per hour. See Note at cyclone.