From Middle English adden, from Latin addō, from ad ("to") + dō ("give").

• enPR: ăd, IPA: /æd/

add (adds, present participle adding; simple past and past participle added)

1. (transitive) To join or unite (e.g. one thing to another, or as several particulars) so as to increase the number, augment the quantity or enlarge the magnitude, or so as to form into one aggregate.
2. To sum up; to put together mentally; to add up.

   to add numbers

   • 1689 (indicated as 1690), [John Locke], An Essay Concerning Humane Understanding. […], London: […] Eliz[abeth] Holt, for Thomas Basset, […], →OCLC ↗:

     […] as easily as he can add together the ideas of two days or two years.

3. (transitive) To combine elements of (something) into one quantity.

   to add a column of numbers

4. (transitive) To give by way of increased possession (to someone); to bestow (on).
   • 1611, The Holy Bible, […] (King James Version), London: […] Robert Barker, […], →OCLC ↗, Genesis 30:24 ↗:

     The Lord shall add to me another son.

   • 1667, John Milton, “(please specify the page number)”, in Paradise Lost. […], London: […] [Samuel Simmons], and are to be sold by Peter Parker […]; [a]nd by Robert Boulter […]; [a]nd Matthias Walker, […], →OCLC ↗; republished as Paradise Lost in Ten Books: […], London: Basil Montagu Pickering […], 1873, →OCLC ↗:

     Back to thy punishment, False fugitive, and to thy speed add wings.

5. (transitive) To append (e.g. a statement); to say further information; to add on.
   • 1849–1861, Thomas Babington Macaulay, The History of England from the Accession of James the Second, volume (please specify |volume=I to V), London: Longman, Brown, Green, and Longmans, →OCLC ↗, page 37 ↗:

     He added that he would willingly consent to the entire abolition of the tax

   • 1900 May 17, L[yman] Frank Baum, chapter 23, in The Wonderful Wizard of Oz, Chicago, Ill., New York, N.Y.: Geo[rge] M[elvin] Hill Co., →OCLC ↗:

     "Bless your dear heart," she said, "I am sure I can tell you of a way to get back to Kansas." Then she added, "But, if I do, you must give me the Golden Cap."

6. (intransitive) To intensify; to augment; to increase; to add on.

   It adds to our anxiety.

   • 1611, The Holy Bible, […] (King James Version), London: […] Robert Barker, […], →OCLC ↗, 1 Kings 12:14 ↗:

     I will add to your yoke

7. (intransitive, mathematics) To perform the arithmetical operation of addition.

   He adds rapidly.

8. (intransitive, video games) To summon minions or reinforcements.

   Typically, a hostile mob will add whenever it's within the aggro radius of a player.

9. (transitive, Internet, text messaging, video games) To add someone as a friend.

• (join or unite so as to increase the number) annex; See also Thesaurus:add
• (put together mentally) add up, sum; See also Thesaurus:summate
• (give by way of increased possession) bestow, give; See also Thesaurus:give
• (combine elements into one quantity) coalesce, join, unite
• (say further information) mention, note
• (make an addition) augment, increase; See also Thesaurus:augment
• (perform the arithmetical operation of addition)

• (antonym(s) of “quantity”): subtract
• (antonym(s) of “matter”): remove

• addend

• French: ajouter
• German: hinzufügen
• Italian: aggiungere
• Portuguese: acrescentar
• Russian: добавля́ть
• Spanish: añadir, apostillar

• French: additionner, ajouter, sommer
• German: hinzufügen, zugeben
• Italian: aggiungere
• Portuguese: adicionar
• Russian: добавля́ть
• Spanish: añadir

• French: additionner, faire une addition
• German: addieren
• Italian: sommare, addizionare
• Portuguese: somar, adicionar
• Russian: прибавля́ть
• Spanish: adicionar, sumar

add (plural adds)

1. (radio) The addition of a song to a station's playlist.
   • 2006, David Baskerville, Music Business Handbook and Career Guide, page 370:

     In a typical week, 10 to 15 songs may be up for consideration as “adds” of new songs for the station's playlist.

   • 2013, Russ Hepworth-Sawyer, From Demo to Delivery:

     Effectiveness of their work is measured by the number of “adds” they receive on the airplay charts of major trades.

2. (computer science) An act or instance of adding.
   • 2004, C. K. Birdsall, A. B. Langdon, Plasma Physics via Computer Simulation, page 75:

     List the number of adds and multiplies for each of the forms (6) , (7), and (8).

3. (video games) An additional enemy that joins a fight after the primary target.

   When the player has fought the boss for one minute, two adds will arrive from the back and must be dealt with.

add

1. Initialism of attention deficit disorder
2. Initialism of accidental death and dismemberment
   • March, 1997, American Bar Association Journal, page 444 ↗:

     Life plus accidental death and dismemberment; disability income; in-hospital indemnity; major medical; ADD/250 high-limit coverage accidental loss of life, limbs, sight, speech, or hearing.

   • 2003, Program Director’s Handbook, volume 21 / 29, AmeriCorps, page 12 ↗:

     We do not endorse a particular provider of ADD insurance.

3. A designation on prerecorded compact discs indicating that the contents were recorded in analog but mixed and mastered in digital; compare AAD, DAD, DDD.

• (accidental death and dismemberment) AD&D