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

OTHER WORDS FROM add

WORDS THAT MAY BE CONFUSED WITH add

ad add oddaddable edibleadds ads adz
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2020

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

Medical 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.

Scientific 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.