obsolete
//ˌɒb.səˈliːt//
Adjective
obsoleteCanonical form
1
No longer in use or no longer useful; out of date.
This software is obsolete and needs to be replaced.
2
(of a word, expression, or custom) no longer in everyday use but sometimes used for special effect.
The dictionary marks 'thou' as an obsolete pronoun, though it still appears in poetry.
Synonym
Verb
1
To cause (something) to become outdated or no longer used; to replace with something newer.
Smartphones have obsoleted many traditional devices.