[ in-fawr-mer ]
/ ɪnˈfɔr mər /


a person who informs against another, especially for money or other reward.
a person who informs or communicates information or news; informant.

Origin of informer

Middle English word dating back to 1350–1400; see origin at inform1, -er1
Can be confusedinformant informer Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019

Examples from the Web for informer

British Dictionary definitions for informer


/ (ɪnˈfɔːmə) /


a person who informs against someone, esp a criminal
a person who provides informationhe was the President's financial informer
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

Word Origin and History for informer



late 14c., enfourmer "instructor, teacher," native agent noun from inform and also from Old French enformeor. Meaning "one who gives information against another" (especially in reference to law-breaking) is c.1500.

Online Etymology Dictionary, © 2010 Douglas Harper