C1 许多，大量
a large number of something
There's a whole host of reasons why he didn't get the job. 有一大堆理由可以解释他为什么没有得到那份工作。
Their clients were using a host of different advertising methods.
We read works by Swift, Kipling, Waugh, and a host of lesser writers.
Use of these fuels creates a host of environmental and human health problems.
There was a whole host of reasons why the business failed.
See also: host noun (A LOT)