Origin: Germanic Old English prefix
Outdated has 2 different meanings across 1 category:
old; no longer valid or fashionable
"obsolete words"
"an obsolete locomotive"
"outdated equipment"
"superannuated laws"
"out-of-date ideas"
Out of date, old-fashioned, antiquated.
"The museum still uses outdated exhibits to display historical artifacts from the 1950s."
In plain English: Outdated means something is old and no longer useful because newer versions have replaced it.
"The old computer software is outdated and cannot run on modern devices."
The word is formed by combining out with date, creating a term that literally means past its expiration date. It entered English as an adjective to describe things that are no longer current or modern.