a person who informs against someone, esp a criminal a person who provides information
WordReference Random House Learner's Dictionary of American English © 2025
in•form•er /ɪnˈfɔrmɚ/USA pronunciation n. [countable]
WordReference Random House Unabridged Dictionary of American English © 2025- one who gives information, esp. secretly, as to the police.
in•form•er
(in fôr′mər),USA pronunciation n.
- a person who informs against another, esp. for money or other reward.
- a person who informs or communicates information or news;
informant.
- 1350–1400; Middle English; see inform1, -er1
Collins Concise English Dictionary © HarperCollins Publishers::
'informer' also found in these entries (note: many are not synonyms or translations):
O'Flaherty
- Wild
- blood money
- canary
- capper
- cheese eater
- clear
- contract
- finger
- fink
- fizgig
- index
- informant
- intelligencer
- nark
- pimp
- promoter
- rat
- sing
- sneak
- snitch
- snout
- squeak
- squeal
- stool
- stool pigeon
- supergrass
- sycophant
- tattletale
- tout
- weasel