supergrass

British

/ ˈsuːpəˌɡrɑːs /

noun

an informer whose information implicates a large number of people in terrorist activities or other major crimes

"Collins English Dictionary — Complete & Unabridged" 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012

Example Sentences

Examples are provided to illustrate real-world usage of words in context. Any opinions expressed do not reflect the views of Dictionary.com.

The fate of the supergrass, under witness protection somewhere in the UK, also captivated people.

From BBC

A planned trial collapsed in 2011, after a judge ruled so-called supergrass evidence could not be used in the case.

From BBC

Police work with three supergrass witnesses - criminals who are giving information.

From BBC

According to Mr Skelton the main point of evidence was from a man called Dennis Woodman, a "supergrass" who had given testimony in five or six other trials in England.

From BBC

Incidentally, he also reckons that with a £5m budget to pay supergrasses and informers he could catch 10 times more cheats than the authorities.

From The Guardian

Definitions and idiom definitions from Dictionary.com Unabridged, based on the Random House Unabridged Dictionary, © Random House, Inc. 2023