1. Make an addition (to); join or combine or unite with others; increase the quality, quantity, size or scope of
   "We added two students to that dorm room"; "She added a personal note to her letter"; "Add insult to injury"; "Add some extra plates to the dinner table" 
2. State or say further
   - append, supply 
3. Bestow a quality on
   "The music added a lot to the play"; "This adds a light note to the program"
   - lend, impart, bestow, contribute, bring 
4. Make an addition by combining numbers
   "Add 27 and 49, please!"
   - add together 
5. Determine the sum of
   "Add all the people in this town to those of the neighbouring town"
   - total, tot, tot up, sum, sum up, summate, tote up, add together, tally, add up 
6. Constitute an addition
   "This paper will add to her reputation"

1. A condition (mostly in boys) characterized by behavioral and learning disorders
   - attention deficit disorder, attention deficit hyperactivity disorder, ADHD, hyperkinetic syndrome, minimal brain dysfunction, minimal brain damage, MBD

Sounds like: ad

Derived forms: adding, adds, added

See also: add up, addable, adder, addition, additive

Type of: alter, calculate, change, cipher, compute, constitute, count, cypher, enumerate, figure [N. Amer], form, increase, make, modify, number, numerate, reckon, say, state, syndrome, tell, work out

Antonym: subtract, take away

Encyclopedia: ADD

• telephone call
• telephone circuit
• telephone company
• telephone conversation
• telephone cord
• telephone dial
• telephone directory
• telephone exchange
• telephone extension
• telephone interview
• telephone jack
• telephone kiosk
• telephone line
• telephone message
• telephone number
• telephone operator
• telephone order
• telephone plug
• telephone pole
• telephone receiver
• telephone service
• telephone set
• telephone system
• telephone unit
• telephone wire