Dictionary.com
definitions
  • synonyms

add-on

[ad-on, -awn]
See more synonyms for add-on on Thesaurus.com
noun
  1. a device or unit added to equipment or a construction: an add-on to a computer; a nice add-on to an old house.
  2. an extra charge: Add-ons for taxes and tour guide fees boosted the price of the vacation to $2,500.
  3. an additional item, as a rider or provision: This is just another legislative add-on.
  4. anything added on: a hi-fi system that can be augmented with add-ons like extra speakers.
Show More
adjective
  1. being installed or provided as an add-on: an add-on speaker system.
Show More

Origin of add-on

First recorded in 1945–50; noun and adj. use of verb phrase add on
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018

Related Words

supplementpreservativeadditionextraaccompanimentadd-on

Examples from the Web for add-on

Contemporary Examples


British Dictionary definitions for add-on

add-on

noun
  1. a feature that can be added to a standard model or package to give increased benefits
Show More
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 add-on

n.

"additional component," 1941, from add (v.) + on.

Show More
Online Etymology Dictionary, © 2010 Douglas Harper