Etymologically

plethora

Etymology and origin of the English word plethora

Pronunciation

  • IPA: /ˈplɛθəɹə/, /ˈplɛðəɹə/[1]

Etymology

It is borrowed from Late Latin plethora,[2][3][4] from Ancient Greek πληθώρα (plēthṓra, “fullness”),[2][3][4][5][6] from plḗthein “to be full”,[2][3][4][5] ultimately from Proto-Indo-European *pelə- (“to fill”).[2][4] Merriam-Webster gives the Latin as Medieval Latin and RHWU as New Latin.[5][6]

Earliest recorded meaning

In medicine, a condition caused by an excess of blood or other body fluid.[4][7][3]

Semantic evolution

The OED records a figurative sense of over-fullness or unhealthy excess from 1597,[7] while Barnhart and Etymonline date the sense “too much” to 1700.[3][4] The word is now used mainly of an abundance or excess of anything,[2][5][6][1] and RHWU marks the medical sense archaic.[6]

Timeline

  • 1541 – the medical sense;[7][5][3] Etymonline gives the 1540s.[4]
  • 1597 – figurative over-fullness.[7]
  • 1700 – too much of anything.[3][4]

Modern meaning

Noun

  1. An excess or overabundance; also, a great amount.
  2. (medicine) An excess of blood in the body or in one part of it.

Word family

  • plethoric

References

  1. [1] [2] Wiktionary, the free dictionary, https://en.wiktionary.org
  2. [1] [2] [3] [4] [5] The American Heritage Dictionary of the English Language (1992), 3rd ed., Boston: Houghton Mifflin
  3. [1] [2] [3] [4] [5] [6] [7] Barnhart, Robert K., ed. (1995), The Barnhart Concise Dictionary of Etymology, New York: HarperCollins
  4. [1] [2] [3] [4] [5] [6] [7] [8] Harper, Douglas, Online Etymology Dictionary, https://www.etymonline.com
  5. [1] [2] [3] [4] [5] Merriam-Webster's Collegiate Dictionary (2003), 11th ed., Springfield, Mass.: Merriam-Webster
  6. [1] [2] [3] [4] Random House Webster's Unabridged Dictionary (1999), 2nd ed., New York: Random House
  7. [1] [2] [3] [4] Simpson, J. A.; Weiner, E. S. C., eds. (1989), The Oxford English Dictionary, 2nd ed., Oxford: Clarendon Press

Related etymologies

  • decimate · also from Proto-Indo-European
  • nostalgia · also from Proto-Indo-European
  • nausea · also from Proto-Indo-European
  • budget · also from Proto-Indo-European
  • egregious · also from Proto-Indo-European
  • terrific · also from Proto-Indo-European
  • alibi · also from Proto-Indo-European
  • mnemonic · also from Proto-Indo-European
Cite this entry

“Plethora.” Etymologically, 8 Oct. 2026, etymologically.com/en/plethora. Accessed 8 Oct. 2026.

Last edited on .