thereof

[thair-uhv, -ov]

adverb

1. of that or it.

2. from or out of that origin or cause.

thereof

/ ˌðɛərˈɒv /

adverb

1. of or concerning that or it

2. from or because of that

Word History and Origins

Origin of thereof¹

before 1000; Middle English therof, Old English thǣrof. See there, of ¹

Example Sentences

The amendment says: “All persons born or naturalized in the United States and subject to the jurisdiction thereof are citizens of the United States.”

From Los Angeles Times

Newsom was icier when asked by a reporter about the interaction — or lack thereof — on Friday.

From Los Angeles Times

Their recent actions have revived a debate on the rights – or lack thereof – of low-wage labourers in Singapore.

From BBC

From what we can surmise, the baby is a device to showcase the nobility of the show’s male characters or lack thereof.

From Salon

The 14th Amendment, adopted in 1868, says “All persons born or naturalized in the United States and subject to the jurisdiction thereof are citizens of the United States and of the State wherein they reside.”

From Los Angeles Times

When To Use

What does thereof mean?

Thereof means of, from, because of, or concerning the thing that was just mentioned, as in The warranty covers the device and the parts thereof (translation: The warranty covers the device and the parts of the device).Thereof is fairly formal. It’s often used in legal language, but it can also be used in everyday speech and writing.Thereof is perhaps most commonly used in the phrase lack thereof, meaning the lack of the thing just mentioned. This is used in cases in which something is mentioned in a general way but the situation being discussed involves the lack of that thing, as in Most relationship problems are due to communication, or a lack thereof (translation: Most relationship problems are due to communication issues, specifically a lack of communication).Other common phrases that use the word are combination thereof (meaning a combination of the things just mentioned) and portion thereof (meaning a portion of the things just mentioned).Example: My research is focused on investigating the cause of the disease and the effects thereof.