One who informs against others; an informer.(noun)
One who furnishes linguistic or cultural information to a researcher.(noun)
American Heritage(R) Dictionary of the English Language, Fifth Edition. Copyright (c) 2011 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.
Use "informant" in a sentence
"SEEING the same intelligence would have required asking pefect questions, searching reams of paper to find the hidden qualifiers, such as “the informant is a liar.”"
"The CIA agents killed by an informant is a pretty good indicator that profiling has its limits."
"The involvement of a paid government informant is the only reason four Newburgh, N.Y., men are facing charges they engaged in a plot to blow up a Bronx synagogue and to shoot down military planes last year, defense lawyers said Tuesday."