Used as a participial adjective derived from the verb "outmode".
Definitions
Rendered obsolete or antiquated through the passage of time or technological progress. Many once-cutting-edge devices are now outmoded by rapid advances in electronics.
Synonyms
behind the times
out of date
Used attributively/predicatively as an adjective meaning ‘obsolete’.
Definitions
No longer fashionable, useful, or modern; obsolete. The report relies on outmoded data-collection techniques.