informant
Pronunciation:
/ɪnˈfɔːmənt//ɪnˈfɔɹmənt/noun
Definitions
One who relays confidential information to someone, especially to the police; an informer.
A native speaker who acts as a linguistic reference for a language being studied. The informant demonstrates native pronunciation, provides grammaticality judgments regarding linguistic well-formedness, and may also explain cultural references and other important contextual information.