Etymologically
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continuum

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Pronunciation

  • /kənˈtɪnjuəm/, /-(j)ɪu̯əm/[1]

Etymology

It is borrowed from Latin continuum (“a continuous thing”), the neuter of continuus (“joining, connecting; following one after another”) used as a noun.[2][3][4][5][6] The adjective comes from contineō, which in its intransitive use meant "to be uninterrupted", literally "to hang together";[2] the verb is formed from com- (“with, together”) and teneō (“to hold”), from Proto-Indo-European *ten- (“to stretch”).[2] It is related to continuous, continue and contain.[2][4][7]

Earliest recorded meaning

A continuous extension, a connection of parts as close as that of the instants of time: Etymonline dates it to the 1640s.[2] Merriam-Webster dates the first use to 1646,[7] and the OED's first quotation, of a continuous thing or quantity, is from Sir Thomas Browne's Pseudodoxia Epidemica in 1650.[3]

Semantic evolution

The word entered English as a term of philosophy and natural science for a continuous thing, quantity or substance, or a series of elements that pass into one another.[3][5] In mathematics it came to mean the set of real numbers, or a set with as many points as the real numbers in an interval.[4][5] In physics the OED records the phrase space-time continuum.[3][5] In general use it now names a range or sequence in which neighbouring parts differ only slightly, while its ends are clearly distinct.[8][9][4] The Latin plural continua is still used beside continuums.[2][7][9]

Timeline

  • 1640s – a continuous extension.[2][6]
  • 1646 – first known use in Merriam-Webster.[7][8]
  • 1650 – a continuous thing, quantity or substance, in Sir Thomas Browne.[3]

Meanings

Noun

  1. A continuous series or whole whose parts cannot be told apart from their neighbours except by an arbitrary division, though its ends differ: The two dialects form a continuum along the coast.[4][9][8]
  2. (mathematics) The set of all real numbers, or a set with as many points as the real numbers in an interval.[4][5]
  3. A continuous thing, quantity or substance, as in space-time continuum.[3][5]

Word family

  • continuum hypothesis

References

  1. ^ Wiktionary, the free dictionary, https://en.wiktionary.org
  2. ^ a b c d e f g Harper, Douglas. Online Etymology Dictionary, https://www.etymonline.com
  3. ^ a b c d e f Oxford English Dictionary Online (accessed March 2026), Oxford: Oxford University Press
  4. ^ a b c d e f The American Heritage Dictionary of the English Language (online 2024), 5th ed., Boston: Houghton Mifflin Harcourt
  5. ^ a b c d e f Shorter Oxford English Dictionary on Historical Principles (2002), 5th ed., ed. William R. Trumble and Angus Stevenson, Oxford: Oxford University Press
  6. ^ a b Dictionary.com Unabridged (2016), based on the Random House Unabridged Dictionary, New York: Random House
  7. ^ a b c d Merriam-Webster Unabridged Dictionary (2024), online ed., Springfield, Mass.: Merriam-Webster
  8. ^ a b c Merriam-Webster's Collegiate Dictionary (2003), 11th ed., Springfield, Mass.: Merriam-Webster
  9. ^ a b c Collins English Dictionary (2023), Glasgow: HarperCollins