add

 
Pronunciation: /ad/

verb

[with object]
  • 1join (something) to something else so as to increase the size, number, or amount: a new wing was added to the building some box offices now add on a convenience charge (as adjective added) one vitamin tablet daily will give added protection
  • [no object] (add up) increase in amount, number, or degree: watch those air miles add up!
  • 2put in (an additional element, ingredient, etc.): chlorine is added to the water to kill bacteria (as adjective added) the fruit juice contains no added sugar
  • contribute (an enhancing quality) to something: the suite will add a touch of class to your bedroom
  • 3put together (two or more numbers or amounts) to calculate their total value: they added all the figures up add the two numbers together
  • [no object] (add up to) amount to: this adds up to a total of 400 calories figurative these isolated incidents don’t add up to a true picture of the situation
  • [no object, usually with negative] (add up) informal seem reasonable or consistent; make sense: many things in her story didn’t add up
  • 4 [reporting verb] say as a further remark: [with direct speech]: ‘I hope we haven’t been too much trouble,’ she added politely [with object]: we would like to add our congratulations

Origin:

late Middle English: from Latin addere, from ad- 'to' + the base of dare 'put'