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obsolete

American  
[ob-suh-leet, ob-suh-leet] / ˌɒb səˈlit, ˈɒb səˌlit /

adjective

  1. no longer in general use; fallen into disuse.

    an obsolete expression.

    Antonyms:
    modern, new
  2. of a discarded or outmoded type; out of date.

    an obsolete battleship.

    Synonyms:
    old, ancient, antiquated
    Antonyms:
    modern, new
  3. (of a linguistic form) no longer in use, especially, out of use for at least the past century.

  4. effaced by wearing down or away.

  5. Biology. imperfectly developed or rudimentary in comparison with the corresponding character in other individuals, as of a different sex or of a related species.


verb (used with object)

obsoleted, obsoleting
  1. to make obsolete by replacing with something newer or better; antiquate.

    Automation has obsoleted many factory workers.

obsolete British  
/ ˌɒbsəˈliːt, ˈɒbsəˌliːt /

adjective

  1. out of use or practice; not current

  2. out of date; unfashionable or outmoded

  3. biology (of parts, organs, etc) vestigial; rudimentary

"Collins English Dictionary — Complete & Unabridged" 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012

Usage

Terms and definitions labeled Obsolete in this dictionary have not been in widespread use since the mid 1700s. Unlike some relatively familiar archaic words and phrases, like prithee and thou art, obsolete words and phrases are not easily understood by a modern reader, and obsolete senses of current terms, as found in definitions 13, 14, and 15 of nice, are even more difficult for a contemporary reader to recognize.

The word obsoleteness is hardly ever used, obsolescence standing as the noun form for both obsolete and obsolescent

Other Word Forms

Derived Forms

Etymology

Origin of obsolete

First recorded in 1570–80; from Latin obsolētus, past participle of obsolēscere “to fall into disuse,” perhaps equivalent to ob- ob- + sol(ēre) “to be accustomed to” + -ēscere -esce

Explanation

Use the adjective obsolete for something that is out of date. As the Rolling Stones song "Out of Time" goes, "You're obsolete, my baby, my poor old-fashioned baby." Obsolete is from the Latin obsolescere "to fall into disuse," and it is a very handy adjective for anything that is no longer used, from words to factories to computer software to ways of thinking. Something that is obsolete has usually been displaced by a newer, shinier innovation. Compact discs made records and cassettes obsolete, and then downloadable digital music files made compact discs obsolete.

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Vocabulary lists containing obsolete

Example Sentences

Examples are provided to illustrate real-world usage of words in context. Any opinions expressed do not reflect the views of Dictionary.com.

Obsolete century-old commercial and industrial buildings to the east were renovated into desirable housing and fashionably unconventional offices.

From Los Angeles Times • Jun. 20, 2023

Obsolete equipment discarded by the International Space Station in 2020 re-entered the Earth's atmosphere causing the space junk to be seen burning over Northern California.

From BBC • Mar. 22, 2023

In the article — first reported earlier that week by Salon and titled "Women in Combat: Is the Current Policy Obsolete?"

From Salon • Jul. 13, 2020

Other books are named seemingly because the power of what they say about those who carry them around overcomes Wiener’s conceit: Are Prisons Obsolete?,

From Slate • Jan. 7, 2020

Obsolete is commonly used, instead of antiquated, in reference to language, customs, etc.; as, an obsolete word or phrase, an obsolete expression.

From Webster's Unabridged Dictionary by Webster, Noah

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