The phrase "alarming number" means a large or high quantity that causes concern or worry.
Sentences with «alarming number»
Recently, there has been an increasingly alarming number of reports in the media about children being targeted and groomed online. (qaeducation.co.uk)
Unfortunately, there's a lot of evidence out there that the turbines kill bats in alarming numbers — more than they do birds. (treehugger.com)
While many privileged kids project confidence and know how to make a good impression, alarming numbers lack the basic foundation of psychological development: an authentic sense of self. (madelinelevine.com)