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informant

[in-fawr-muh nt] /ɪnˈfɔr mənt/
noun
1.
a person who informs or gives information; informer.
2.
a person who supplies social or cultural data in answer to the questions of an investigator.
3.
Linguistics. a native speaker of a language who supplies utterances and forms for one analyzing or learning the language.
Origin
1655-1665
1655-65; < Latin infōrmant- (stem of infōrmāns) present participle of infōrmāre. See inform1, -ant
Can be confused
informant, informer.
Synonyms
1. source, adviser, tipster.
Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2014.
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British Dictionary definitions for informants

informant

/ɪnˈfɔːmənt/
noun
1.
a person who gives information about a thing, a subject being studied, etc
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
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Word Origin and History for informants

informant

n.

1660s, "someone or something that supplies information," from Latin informantem (nominative informans), present participle of informare (see inform). Meaning "one who gives information to the authorities, informer" is from 1783. As an adjective from 1890. The older noun was informer.

Online Etymology Dictionary, © 2010 Douglas Harper
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Word Value for informants

15
18
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