Etymologically
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therein

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Pronunciation

  • UK: /ˈðɛəɹˈɪn/[1]

Etymology

It is inherited from Middle English therin, also ther-inne,[2][3][4] inherited from Old English þǣrin,[3][5][2] a compound from Old English þǣr (“there”) + in (“in”).[3][4][6] German has a similar formation, darin.[2] Etymonline dates thereinto from about 1300 and thereout from the mid-13th century.[2]

Earliest recorded meaning

In that place or material thing: in Old English, first in the Metres of Boethius.[6][7] In Old English it was also used as a relative adverb, "in which", the sense now taken by wherein.[6][8]

Semantic evolution

From the early 13th century the word also referred to an affair or matter, "in that particular, in that respect", first in Hali Meidenhad (about 1230),[6][7] and it could mean "into that place or thing" before 1240, in Sawles Warde.[6] The relative use, "in which", died out about 1500.[6][7] The Great Bible of 1539 used it of time, "in or during that time".[6] Chaucer used therinne 34 times and Gower 49 times.[9] Johnson (1755) defined it simply as "in that; in this", quoting Shakespeare's "Therein our letters do not well agree".[10] In Scots it has meant "indoors, inside the house" since 1822, in Hogg.[6][8] Today the word is chiefly formal,[8][11] and in legal writing thereinafter (by 1818) and thereinbefore were formed on it.[2]

Timeline

  • Old English – in that place or thing (Metres of Boethius); also relative, in which.[6]
  • c. 1230 – in that matter or respect (Hali Meidenhad).[6]
  • before 1240 – into that place or thing (Sawles Warde).[6]
  • 1500 – last record of the relative sense, in which.[6][7]
  • 1535 – thereon (Coverdale Bible; obsolete).[6]
  • 1539 – in or during that time (Great Bible).[6]
  • 1818 – thereinafter recorded.[2]
  • 1822 – Scots, indoors (Hogg).[6]

Meanings

Adverb

  1. In or into that place, thing or document: The drawer and the letters kept therein were lost in the fire.[3][8][11]
  2. In that respect or matter; in that particular: Therein lies the difficulty.[3][8][12]
  3. In or during that time.[12][6]
  4. (Scottish) Indoors, inside the house.[6][8]
  5. (obsolete, Old English–1500) In which; wherein.[6][8]

Usage notes

The word is now chiefly formal or legal.[8][11]

References

  1. ^ Wiktionary, the free dictionary, https://en.wiktionary.org
  2. ^ a b c d e f Harper, Douglas. Online Etymology Dictionary, https://www.etymonline.com
  3. ^ a b c d e Merriam-Webster Unabridged Dictionary (2024), online ed., Springfield, Mass.: Merriam-Webster
  4. ^ a b Klein, Ernest. A Comprehensive Etymological Dictionary of the English Language. 2 vols. Amsterdam: Elsevier, 1966–1967.
  5. ^ Dictionary.com Unabridged (2016), based on the Random House Unabridged Dictionary, New York: Random House
  6. ^ a b c d e f g h i j k l m n o p q r Oxford English Dictionary Online (accessed March 2026), Oxford: Oxford University Press
  7. ^ a b c d Kay, Christian; Roberts, Jane; Samuels, Michael; Wotherspoon, Irené, eds. (2009), Historical Thesaurus of the Oxford English Dictionary, Oxford: Oxford University Press; online edition (2024)
  8. ^ a b c d e f g h Shorter Oxford English Dictionary on Historical Principles (2002), 5th ed., ed. William R. Trumble and Angus Stevenson, Oxford: Oxford University Press
  9. ^ Benson, Larry D., Glossarial Concordance to Middle English (Chaucer, Gower), Johns Hopkins University, github.com/jhu-digital-manuscripts/gcme
  10. ^ Johnson, Samuel (1755), A Dictionary of the English Language, London; 4th ed. 1773; Johnson's Dictionary Online, ed. Beth Rapp Young et al.
  11. ^ a b c Collins English Dictionary (2023), Glasgow: HarperCollins
  12. ^ a b The American Heritage Dictionary of the English Language (1992), 3rd ed., Boston: Houghton Mifflin