| 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,
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ADD abbr.
attention deficit disorder
add up to
Amount to, signify, as in The smooth airline connections, luxury hotel, and fine weather added up to the best vacation we'd ever had. [Early 1900s] Also see add up.