Definition of "really"
really1
/ˈɹɪə.li/
interjection
(informal) Indicating surprise at, or requesting confirmation of, some new information; to express skepticism.
(informal, sarcastic, typically exaggerated question.) Indicating that what was just said was obvious and unnecessary; contrived incredulity
(informal, chiefly US) Indicating affirmation, agreement.
(informal) Indicating displeasure at another person's behaviour or statement.
really2
verb
third-person singular simple present reallies, present participle reallying, simple past and past participle reallied