- The definition of semiarid is a climate or place that is partially arid, or semi-dry and has less than 20 inches of rain each year.
An example of semiarid climates is the hot, semiarid climate of the Outback in Australia.
characterized by little yearly rainfall and by the growth of short grasses and shrubs: said of a climate or region
Characterized by relatively low annual rainfall of 25 to 50 centimeters (10 to 20 inches) and having scrubby vegetation with short, coarse grasses; not completely arid.
(comparative more semiarid, superlative most semiarid)