| 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. | 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. |
| 5. | 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. | Journalism. copy added to a completed story. |
| 8. | add up to, to signify; indicate: The evidence adds up to a case of murder. |
| 9. | add up,
|
ADD abbr.
attention deficit disorder
| ADD
Abbreviation of attention deficit disorder |
add up
Amount to an expected or correct total, as in These figures don't add up, meaning they are not correct. [Mid-1800s]
Be consistent, make sense, as in I'm not sure that all this testimony will add up. [First half of 1900s]
Assess, form an opinion of, as in He looked across the track and added up the competition. Also see add up to.