in·​sti·​tor | \ ˈinztəˌtȯ(ə)r, ˈin(t)stə- \
plural -s

Definition of institor

: a person (as the manager of a commercial or manufacturing business, a broker, factor, or commission agent) to whom the transaction of some business is committed as agent to such a degree as to bind the principal used chiefly in Roman and civil law

Love words?

You must — there are over 200,000 words in our free online dictionary, but you are looking for one that’s only in the Merriam-Webster Unabridged Dictionary.

Start your free trial today and get unlimited access to America's largest dictionary, with:

  • More than 250,000 words that aren't in our free dictionary
  • Expanded definitions, etymologies, and usage notes
  • Advanced search features
  • Ad free!

Other Words from institor

institorial \ ¦⸗⸗¦tōrēəl \ adjective

History and Etymology for institor

Latin, from instit- (perfect stem of insistere to occupy a place in, stand upon, persist) + -or

Keep scrolling for more

Learn More about institor

Statistics for institor

Cite this Entry

“Institor.” Dictionary, Merriam-Webster, Accessed 27 Sep. 2020.

Comments on institor

What made you want to look up institor? Please tell us where you read or heard it (including the quote, if possible).


Test Your Vocabulary

Challenging Vocabulary Quiz Returns!

  • stylized drawing of woman pole vaulting across gap to get trophy
  • Which is a synonym of fuliginous?
Spell It

Can you spell these 10 commonly misspelled words?

Bee Cubed

Test Your Knowledge - and learn some interesting things along the way.

Love words? Need even more definitions?

Subscribe to America's largest dictionary and get thousands more definitions and advanced search—ad free!