1. in an obsolete manner; in a way that is no longer in use or out of date
Usage: rare

Examples

• The document was obsoletely formatted according to standards from decades ago.
• He dressed obsoletely, wearing styles that had long gone out of fashion.
• The software was obsoletely designed and couldn’t handle modern file formats.
• The building was obsoletely constructed without modern safety features.
• She spoke obsoletely, using phrases that sounded archaic to younger listeners.