Obsolete
Obsolete , adjective
[Latin obsoletus, past participle of obsolescere. See Obsolescent.]
1.
No longer in use; gone into disuse; disused; neglected; as, an obsolete word; an obsolete statute; -- applied chiefly to words, writings, or observances.
2.
(Biology) Not very distinct; obscure; rudimental; imperfectly developed; abortive.
Obsolete , intransitive verb
To become obsolete; to go out of use. [Rare] — Fitzed. Hall