rhizoverbBeta
DictionarythereofOf that
adverb

thereof

thair-UV/ˌðerˈʌv/

Of or from the thing just mentioned.

The teapot lies on the table while the visitors discuss the cracked handle thereof.

After one person places a broken teapot on the table, another points to its cracked handle and discusses that part of the same teapot.
Etymology
thereOld Englishin or at that place
+ofOld Englishaway from

With “of” originally meaning “away from,” the pieces could express “out of that place.” As “of” developed relational uses, “thereof” also expressed belonging or reference to the thing just mentioned.

In context

Raffaello D'Andrea2:10
Like other fixed-wing aircraft, it is efficient in forward flight, much more so than helicopters and variations thereof.
Meet the dazzling flying machines of the future | Raffaello D'Andrea
Vox3:11
Now, let's relate that to US-19's pedestrian design or lack thereof.
America's deadliest road, explained

More examples

  • The report describes the damage and the likely causes thereof.
  • Payment, or the lack thereof, determines whether service continues.
  • Please submit the original document or a copy thereof.

Similar words

of it
Expresses the same relationship in ordinary, less formal language.
from it
Fits when the relationship involves a source rather than possession.