Definition
"Erst" is an archaic word meaning "formerly" or "previously." It indicates something that happened in the past but is no longer the case. Think of it as an old-fashioned way of saying "once upon a time" or "in former times." It is rarely used in modern English, mostly appearing in historical or literary contexts. It adds a sense of old-world charm or formality. Its use often signals a desire to evoke a bygone era.