Definition
'Really' has several uses, primarily serving to intensify or emphasize something. It can mean 'truly,' 'genuinely,' or 'actually.' It can also express surprise, disbelief, or interest. It adds a layer of emotional emphasis to a statement. Think of saying 'I'm 'really' happy for you!' It makes the statement that much stronger. It's one of those flexible words you can use in a variety of situations.