• synonyms


[ 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).


Word Pairs You Thought Were RelatedRead more in this article about some frequently asked questions and fun facts related to our definitions.

Nearby words

extended play, extended radical mastectomy, extended real number system, extended term insurance, extended-play, extender, extensible, extensile, extensimeter, extension, extension agent

Origin of extender

First recorded in 1605–15; extend + -er1

Definition for extender (2 of 2)


or con·ver·tor

[ kuh n-vur-ter ]
/ kənˈvɜr tər /


Origin of converter

First recorded in 1525–35; convert1 + -er1 Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019

Examples 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 (1 of 2)


/ (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

British Dictionary definitions for extender (2 of 2)



/ (kənˈvɜːtə) /


a person or thing that converts
  1. a device for converting alternating current to direct current or vice versa
  2. a device for converting a signal from one frequency to another or from analogue to digital forms
a vessel in which molten metal is refined, using a blast of air or oxygenSee also Bessemer converter, L-D converter
computing a device for converting one form of coded information to another, such as an analogue-to-digital converter
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

Word Origin and History for extender



1530s, agent noun from convert (v.). Of machinery, from 1867.

Online Etymology Dictionary, © 2010 Douglas Harper

Science definitions for extender


[ kən-vûrtər ]

An electrical device that changes the form of an electric signal or power source, as by converting alternating current to direct current, or an analog signal to a digital signal. Compare rectifier transformer.
An electronic device that changes the frequency of a radio or other electromagnetic signal.
The American Heritage® Science Dictionary Copyright © 2011. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.