A semidesert is a place that is almost a desert, but not quite. It is drier and has less plants than a regular place, but it is not as dry as a real desert.
A semidesert might make people think of hot, dry places with only a few plants.
Examples:
The area around here is a semidesert.
The semidesert has some cacti and a few bushes.
In the semidesert, there are only a few animals.
The semidesert is not quite a desert, but it's still very dry.
In the semidesert, there are only a few plants and animals.
The semidesert is hot and dry, but not as hot and dry as a real desert.