Out-date is a term used to describe something that is no longer relevant or up-to-date. It is a negative connotation and often denotes something that is obsolete, outdated, old-fashioned, or antiquated. However, there are several alternative words that can be used instead of out-date. Some of these synonyms include outdated, archaic, old, passe, obsolete, and antique. They all suggest a similar meaning but may differ slightly in their connotation. While outdated and obsolete suggest that something is no longer useful, antique implies that something is valuable because of its age. Overall, these synonyms offer a range of descriptive options to describe something that is no longer relevant.