[ ik-sten-der ]
/ ɪkˈstɛn dər /


a substance added to another substance, as to paint or food, to increase its volume or bulk: to add cereal and soy protein to hamburger as extenders.
Photography. See under converter (def. 8).



Even if you can't be a professional chef, you can at least talk like one with this vocabulary quiz.
Question 1 of 9
You may have read the word "simmer" in a recipe or two, but what does it really mean?

Origin of extender

First recorded in 1605–15; extend + -er1
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2020

Example sentences from the Web for extender

  • It was apparent by that time that the extender would never be anything in a printing office but a psychological monstrosity.

    Nine Men in Time|Noel Miller Loomis
  • This extender can be prepared 12 to 24 hours before use if it is stored at refrigerator temperature.

  • I shook hands with each one of the High-Pocketses as they filed into the extender.

    Nine Men in Time|Noel Miller Loomis

British Dictionary definitions for extender

/ (ɪkˈstɛndə) /


a person or thing that extends
a substance, such as French chalk or china clay, added to paints to give them body and decrease their rate of settlement
a substance added to glues and resins to dilute them or to modify their viscosity
a substance added to elastomers to assist the plasticizer
printing the part of certain lower-case letters that extends either above (the ascender) or below (the descender) the body of the letter
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