add-in

[ ad-in ]
/ ˈædˌɪn /

noun

a component, as a video card or chip, added to a computer to expand its capabilities.
a small software program that adds a feature to another application.

Origin of add-in

1985–90

Definition for add-in (2 of 2)

Origin of add

1325–75; Middle English adden < Latin addere, equivalent to ad- ad- + -dere to put (combining form; see do1)

SYNONYMS FOR add

Related forms

Can be confused

ad add oddaddable edibleadds ads adz
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019

British Dictionary definitions for add-in (1 of 2)

add

/ (æd) /

verb

noun

informal an instance of adding someone to one's list of contacts on a social networking site, esp MySpaceThanks for the add!
See also add up

Word Origin for add

C14: from Latin addere, literally: to put to, from ad- to + -dere to put

British Dictionary definitions for add-in (2 of 2)

ADD


abbreviation for

attention deficit disorder
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

Medicine definitions for add-in

ADD


abbr.

attention deficit disorder
The American Heritage® Stedman's Medical Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.

Science definitions for add-in

ADD


Abbreviation of attention deficit disorder
The American Heritage® Science Dictionary Copyright © 2011. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.