added

UK: /ˈædɪd/

WordReference Random House Learner's Dictionary of American English © 2025

add /æd/   v. 

1. to unite or join so as to bring about an increase:
   [~ + object + to + object] We added a few more students to the class.
2. Mathematics to find the sum of:
   [~ + object] We added the four numbers together.
3. to perform arithmetic addition:
   [no object] She could add almost as fast as a calculator.
4. [~ + (that) clause] to say or write further: I'd like to add that I'm pleased to be here tonight.
5. to be an addition:
   [~ + to + object] His illness added to the family's troubles.
6. Idioms add up,
   • to amount to the correct total: [no object]
     These figures don't add up right.
     [~ + up + object]
     Add up the numbers.
     [ ~ + obj + up]:
     Add the numbers up.
   • [no obj] to seem reasonable or consistent:
     The facts in that mystery just didn't add up.
7. add up to, [ ~ + up + to + obj] to amount to:
   His ideas didn't add up to anything important.

add•a•ble, add•i•ble, adj. 

WordReference Random House Unabridged Dictionary of American English © 2025

add  (ad), v.t. 

1. 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.
2. Mathematics to find the sum of (often fol. by up):
   Add this column of figures. Add up the grocery bills.
3. to say or write further.
4. to include (usually fol. by in):
   Don't forget to add in the tip.

v.i. 

5. Mathematics to perform the arithmetic operation of addition:
   children learning to add and subtract.
6. to be or serve as an addition (usually fol. by to):
   His illness added to the family's troubles.
7. 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.
8. add up to, to signify;
   indicate:
   The evidence adds up to a case of murder.

n. 

9. Journalism copy added to a completed story.

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

add′a•ble, add′i•ble, adj. 
add′ed•ly, adv. 
Synonyms

• 1. affix, append, attach, adjoin.
• 2. total, sum.

ADD, 

1. Psychology attention deficit disorder.

Collins Concise English Dictionary © HarperCollins Publishers::

add / æd/ verb

1. to combine (two or more numbers or quantities) by addition
2. (transitive) followed by to: to increase (a number or quantity) by another number or quantity using addition
3. (transitive) often followed 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
4. (intransitive) followed by to: to have an extra and increased effect (on)
5. (transitive) to say or write further
6. (transitive) followed by in: to include

Etymology: 14th Century: from Latin addere, literally: to put to, from ad- to + -dere to put