Definition
'Theretofore' means up to that time or until then; before a particular point in time. It's a somewhat old-fashioned word, but it's useful for showing that something changed at a specific moment. Think of it as the 'before' in a 'before and after' picture. It emphasizes the change or contrast that occurred at a specific time. It's like saying 'previously' or 'until then.' Itβs not commonly used in everyday conversation. It often appears in legal or formal writing.