Also found in: Dictionary, Thesaurus, Medical, Legal, Financial, Idioms, Wikipedia.
a feature that can be added to a standard model or package to give increased benefits
Collins Discovery Encyclopedia, 1st edition © HarperCollins Publishers 2005
A peripheral device, such as a printer or disk drive, that is added to a basic computer.
McGraw-Hill Dictionary of Scientific & Technical Terms, 6E, Copyright © 2003 by The McGraw-Hill Companies, Inc.
add-on(1) Software that adds functionality to an existing application. See plug-in.
(2) Hardware that is installed into an existing system. See add-in.
Copyright © 1981-2019 by The Computer Language Company Inc. All Rights reserved. THIS DEFINITION IS FOR PERSONAL USE ONLY. All other reproduction is strictly prohibited without permission from the publisher.