Etymologically
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adaptive

This is the current revision of this entry, as edited by bogdan on 26 October 2026 at 03:20. This address is a permanent link to this version.
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Pronunciation

  • US: /əˈdæp.tɪv/[1]

Etymology

It is formed from English adapt + -ive.[2][3][4][5][6] The OED calls the formation irregular, since the past participle of the Latin verb is adaptātus: the word follows adjectives that were taken from Latin past participle stems identical with the verb stem.[2] The verb adapt is from Middle French adapter (“to apply, adjust”) and its source Latin adaptō (“to make suitable or fit”), formed from ad- (“to”) and aptō (“to fit”), from aptus (“fitted”).[2][6] The classically correct formation adaptative is recorded from 1831.[6]

Earliest recorded meaning

Fitting, apt, well suited to something or someone: 1734, in a sermon by B. Kent; this sense was obsolete by the end of the 18th century.[2]

Semantic evolution

The main sense, "relating to or marked by adaptation", is recorded from 1749, in the revised edition of Aaron Hill's Gideon.[2] The dictionaries date the word very differently: Merriam-Webster's Unabridged gives 1749,[4] the Collegiate 1760,[7] Etymonline 1795,[6] Dictionary.com 1815–25,[5] the Shorter Oxford the early 19th century[3] and the OED 1989 1824.[8] In biology it was used from 1839 of a trait that adapts an organism to its environment,[2] and the phrase adaptive radiation is H. F. Osborn's term for the evolution of diverse forms from one ancestor.[8] From 1863 it also meant "able to adapt, adaptable".[2] The 20th century applied it to machines that adjust themselves automatically (1953),[2] as in adaptive control and adaptive optics,[8] and to sports adapted for disabled people (1944) and equipment that gives a disabled person more independence (1956).[2]

Timeline

  • 1734 – fitting, well suited (obsolete by 1796).[2]
  • 1749 – relating to or characterized by adaptation.[2][4]
  • 1839 – in biology, providing adaptation to an environment or function.[2]
  • 1863 – able to adjust to new situations; adaptable.[2]
  • 1944 – of a sport, adapted so that disabled people can take part.[2]
  • 1953 – of a machine, adjusting itself automatically to changing conditions.[2]
  • 1956 – of equipment, designed to give a disabled person more independence.[2]

Meanings

Adjective

  1. Relating to, showing or contributing to adaptation: an adaptive response to cold.[4][9][2]
  2. In biology, of a trait, helping an organism to survive in its environment.[2][4]
  3. Able to adjust to new conditions; adaptable: Crows are highly adaptive birds.[4][2]
  4. Of a machine or system, adjusting itself automatically to changes in conditions or performance.[2][8]
  5. Of a sport or equipment, adapted for use by people with a disability.[2]

Word family

  • adaptively
  • adaptiveness
  • adaptivity
  • unadaptive
  • preadaptive
  • adaptive optics
  • adaptive radiation

References

  1. ^ Wiktionary, the free dictionary, https://en.wiktionary.org
  2. ^ a b c d e f g h i j k l m n o p q r s t u Oxford English Dictionary Online (accessed March 2026), Oxford: Oxford University Press
  3. ^ a b Shorter Oxford English Dictionary on Historical Principles (2002), 5th ed., ed. William R. Trumble and Angus Stevenson, Oxford: Oxford University Press
  4. ^ a b c d e f Merriam-Webster Unabridged Dictionary (2024), online ed., Springfield, Mass.: Merriam-Webster
  5. ^ a b Dictionary.com Unabridged (2016), based on the Random House Unabridged Dictionary, New York: Random House
  6. ^ a b c d Harper, Douglas. Online Etymology Dictionary, https://www.etymonline.com
  7. ^ Merriam-Webster's Collegiate Dictionary (2003), 11th ed., Springfield, Mass.: Merriam-Webster
  8. ^ a b c d Simpson, J. A.; Weiner, E. S. C., eds. (1989), The Oxford English Dictionary, 2nd ed., Oxford: Clarendon Press
  9. ^ The American Heritage Dictionary of the English Language (1992), 3rd ed., Boston: Houghton Mifflin