[ thair-on, -awn ]
/ ˌðɛərˈɒn, -ˈɔn /
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on or upon that or it.
immediately after that; thereupon.



Apostrophes can be tricky; prove you know the difference between it’s and its in this crafty quiz!
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On the farm, the feed for chicks is significantly different from the roosters’; ______ not even comparable.

Origin of thereon

before 900; Middle English ther on,Old English thǣron.See there, on
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2021


What does thereon mean?

Thereon means on the thing that was just mentioned, as in The cap should be positioned above the container before being placed thereon (translation: The cap should be positioned above the container before being placed on it).

Thereon is formal and is often used in legal language.

It can also mean immediately after the thing just mentioned, as in When the jury is assembled, the trial should proceed thereon.

The word thereupon can be used as a synonym for both senses of thereon.

Example: The book is about the introduction of the printing press in Europe and the effects thereon.

Where does thereon come from?

The first records of the word thereon come from before 900.

There are many similar words based on the combination of the word there and a preposition, each of which has a different meaning, including thereabout, thereabouts, thereafter, thereat, thereby, therefor, therefore, therefrom, therein, thereinafter, thereinto, thereof, theretofore, thereunder, thereupon, therewith, and therewithal.

Other words are constructed in similar ways, such as whereon, meaning “on what or which,” as in the surface whereon it was placed (translation: the surface on which it was placed or the surface it was placed on).

Did you know ... ?

What are some synonyms for thereon?

What are some words that share a root or word element with thereon

What are some words that often get used in discussing thereon?

How is thereon used in real life?

Thereon is formal and is often used in legal language.

Try using thereon!

Is thereon used correctly in the following sentence?

After the guests are seated, the ceremony will commence thereon.

British Dictionary definitions for thereon

/ (ˌðɛərˈɒn) /


an archaic word for thereupon
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012
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