Pronunciation: (in-fôr'munt), [key]
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. Ling.a native speaker of a language who supplies utterances and forms for one analyzing or learning the language.
Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.