OBSOLETE

disused, obsolete

(adjective) no longer in use; “obsolete words”

Source: WordNet® 3.1

Etymology 1

Adjective

obsolete (comparative more obsolete, superlative most obsolete)

(of words, equipment, etc.) No longer in use; gone into disuse; disused or neglected (often by preference for something newer, which replaces the subject).

Synonyms: antiquated, deprecated, disused

(biology) Imperfectly developed; not very distinct.

Synonyms: abortive, obscure, rudimental

Usage notes

• Nouns to which "obsolete" is often applied: word, phrase, equipment, computer, technology, weapon, machine, law, statute, currency, building, idea, skill, concept, custom, theory, tradition, institution.

Synonyms

• (no longer in use): see also obsolete

Etymology 2

Verb

obsolete (third-person singular simple present obsoletes, present participle obsoleting, simple past and past participle obsoleted)

(transitive, US) To cause to become obsolete.

Usage notes

• To obsolete is often used in computing and other technical fields to indicate an effort to remove or replace something.

• Compare deprecated (“no longer considered correct usage”).

Synonyms

• antiquate; see also make older

Source: Wiktionary

Ob"so*lete, a. Etym: [L. obsoletus, p.p. 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. (Biol.)

Definition: Not very distinct; obscure; rudimental; imperfectly developed; abortive.

Syn.

– Ancient; antiquated; old-fashioned; antique; old; disused; neglected. See Ancient.

Ob"so*lete, v. i.

Definition: To become obsolete; to go out of use. [R.] Fitzed. Hall.

Source: Webster’s Unabridged Dictionary 1913 Edition