When a domain has expired, it means that the ownership and control of a website’s unique address or URL has lapsed. This can occur when the owner fails to renew their registration or when the domain is intentionally allowed to expire. As a result, the website associated with the domain may become inaccessible, and any email addresses linked to the domain may also cease to function. In some cases, an expired domain may be purchased by a new owner, leading to a change in the content or purpose of the website.