No longer used by the timid. Said chiefly of words. A word which some lexicographer has marked obsolete is ever thereafter an object of dread and loathing to the fool writer, but if it is a good word and has no exact modern equivalent equally good, it is good enough for the good writer. Indeed, a writer's attitude toward "obsolete" words is as true a measure of his literary ability as anything except the character of his work. A dictionary of obsolete and obsolescent words would not only be singularly rich in strong and sweet parts of speech; it would add large possessions to the vocabulary of every competent writer who might not happen to be a competent reader.
No longer in use; gone into disuse; disused; neglected; as, an obsolete word; an obsolete statute; -- applied chiefly to words, writings, or observances.
No longer current. [D04159] CSM
A stamp no longer available from post offices, although possibly still postally valid.
Stamps which are not available for sale through the post office, though continuing to be valid for postage. Stamps which are no longer valid are declared to be ‘invalidated' or ‘demonetized'.
No longer useful or effective.
In the context of retention schedule, obsolete means no longer relevant to current program or primary functional responsibilities of a department or office.
a part which is out of date and no longer available for purchase
Any advertised business, product, service, match company, design, style, method of classification, or technique which is no longer used, in existence, or popular (i.e., Crown Match Company, Midgets, Classiques, etc.). Not to be confused with "old" as applies to matchcovers. (See Defunct).
A stamp no longer sold by a post office though may still be valid for postage.
No longer in use, useful or functioning as in most home inspection associations. Antiquated.
(noun) No longer in use, or, no longer useful.
A coin design or type that is no longer produced.
Stamps no longer on sale at post offices.
a coin design or series that is no longer being produced.
A synonym of a published name that is no longer acceptable for use. Possible reasons for being invalid are coded as nom. conf., nom. dub., nom. illegit., or nom. nud.
(adj) – No longer in use, out of fashion