Meaning ofadd upin English

Verb

1. to calculate the total; sum up
   The numbers add up to a large total.
2. to be logical; make sense
   Her story doesn't add up, it's full of contradictions.
   Synonyms:

   make sensecomputehold waterhold up
   Antonyms:

   not add upnot make sensenot computenot hold water
3. to accumulate or increase in amount
   The costs will add up quickly if you're not careful.
   Synonyms:

   accumulatetotalsum upamount tomount up
   Antonyms:

   decreasediminishreducelessen dwindle