Added

to unite or join so as to increase the number, quantity, size, or importance:
to add two cups of sugar; to add a postscript to her letter; to add insult to injury.
to find the sum of (often followed by up):
Add this column of figures. Add up the grocery bills.
to say or write further.
to include (usually followed by in):
Don’t forget to add in the tip.
to perform the arithmetic operation of :
children learning to add and subtract.
to be or serve as an (usually followed by to):
His illness added to the family’s troubles.
Journalism. copy added to a completed story.
add up to, to signify; indicate:
The evidence adds up to a case of murder.
add up,

to make the desired, expected, or correct total:
These figures don’t add up right.
to seem reasonable or consistent; be in harmony or accord:
Some aspects of the story didn’t add up.

Contemporary Examples

He added, “This is the whole of the Torah, and the rest is commentary; go learn it.”
Why I’m Against Hamas, Against What Israel Is Doing, and For Judaism Sally Kohn July 24, 2014

He repeated “good old days,” and added “I find myself saying that a lot.”
New York’s Oldest Bar Stays Afloat Michael Daly October 28, 2013

Murray added: “Schneiderman is bringing a knife to a gunfight.”
Inside the Donald Trump–Eric Schneiderman TV Food Fight Lloyd Grove August 28, 2013

With such violent actions, he added, “Cabello is digging the grave of what they call the revolution.”
Fisticuffs in Parliament! Mac Margolis April 30, 2013

Anything bragging that it “CONTAINS REAL FRUIT” is usually hiding a big dose of added sugar that has been extracted from fruit.
What’s in Your Food? Michael Moss Reveals the Food Industry’s Secrets Michael Moss March 23, 2013

Historical Examples

Then she added, “Introduce me to your young friend, my dear.”
A Modern Tomboy L. T. Meade

“And gargle all his ‘r’s,'” added the other, very earnestly.
The Spenders Harry Leon Wilson

“There was an older house once, on your place,” she added pensively.
The Thing from the Lake Eleanor M. Ingram

For good measure a dozen followers of Gaumata had been added.
Ancient Man Hendrik Willem van Loon

“If the tongue isn’t to talk with, it isn’t to tell a lie with,” added Donald.
The Yacht Club Oliver Optic

verb
to combine (two or more numbers or quantities) by addition
(transitive) foll by to. to increase (a number or quantity) by another number or quantity using addition
(transitive) often foll by to. to join (something) to something else in order to increase the size, quantity, effect, or scope; unite (with): to add insult to injury
(intransitive) foll by to. to have an extra and increased effect (on): her illness added to his worries
(transitive) to say or write further
(transitive) foll by in. to include
noun
(informal) an instance of adding someone to one’s list of contacts on a social networking site, esp MySpace: Thanks for the add!
abbreviation
attention deficit disorder
adj.

“additional,” c.1600, past participle adjective from add (v.).
v.

late 14c., “to join or unite (something to something else),” from Latin addere “add to, join, attach, place upon,” from ad- “to” (see ad-) + -dere comb. form meaning “to put, place,” from dare “to give” (see date (n.1)). Meaning “to do sums, do addition” also is from late 14c. Related: Added; adding. To add up “make sense” is from 1942.

ADD abbr.
attention deficit disorder
ADD
Abbreviation of attention deficit disorder
Administration on Developmental Disabilities
attention deficit disorder