add

[ad] /æd/
verb (used with object)
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 followed by up):
Add this column of figures. Add up the grocery bills.
3.
to say or write further.
4.
to include (usually followed by in):
Don't forget to add in the tip.
verb (used without object)
5.
to perform the arithmetic operation of addition:
children learning to add and subtract.
6.
to be or serve as an addition (usually followed by to):
His illness added to the family's troubles.
noun
7.
Journalism. copy added to a completed story.
Verb phrases
8.
add up to, to signify; indicate:
The evidence adds up to a case of murder.
Idioms
9.
add up,
  1. to make the desired, expected, or correct total:
    These figures don't add up right.
  2. to seem reasonable or consistent; be in harmony or accord:
    Some aspects of the story didn't add up.
Origin
1325-75; Middle English adden < Latin addere, equivalent to ad- ad- + -dere to put (combining form; see do1)
Related forms
addable, addible, adjective
addedly, adverb
misadd, verb
readd, verb (used with object)
unaddable, adjective
unadded, adjective
unaddible, adjective
Can be confused
ad, add, odd.
addable, edible.
adds, ads, adz.
Synonyms
1. affix, append, attach, adjoin. 2. total, sum.
British Dictionary definitions for add up

add up

verb (adverb)
1.
to find the sum (of)
2.
(intransitive) to result in a correct total
3.
(intransitive) (informal) to make sense
4.
(intransitive) foll by to. to amount to

add

/æd/
verb
1.
to combine (two or more numbers or quantities) by addition
2.
(transitive) foll by to. to increase (a number or quantity) by another number or quantity using addition
3.
(transitive) often foll 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) foll by to. to have an extra and increased effect (on): her illness added to his worries
5.
(transitive) to say or write further
6.
(transitive) foll by in. to include
noun
7.
(informal) an instance of adding someone to one's list of contacts on a social networking site, esp MySpace: Thanks for the add!
See also add up
Word Origin
C14: from Latin addere, literally: to put to, from ad- to + -dere to put

ADD

abbreviation
1.
attention deficit disorder
Word Origin and History for add up

add

v.

late 14c., "to join or unite (something to something else)," from Latin addere "add to, join, attach, place upon," from ad- "to" (see ad-) + -dere comb. form meaning "to put, place," from dare "to give" (see date (n.1)). Meaning "to do sums, do addition" also is from late 14c. Related: Added; adding. To add up "make sense" is from 1942.

add up in Medicine

ADD abbr.
attention deficit disorder

add up in Science
ADD  
Abbreviation of attention deficit disorder
Related Abbreviations for add up

ADD

  1. Administration on Developmental Disabilities
  2. attention deficit disorder
Idioms and Phrases with add up

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