add up - definition and synonyms

phrasal verb
present tense
I/you/we/theyadd up
he/she/itadds up
present participleadding up
past tenseadded up
past participleadded up
  1. 1
    [intransitive/transitive] to calculate the total of several numbers or amounts

    Now add up the number of calories you have eaten.

    I’m not very good at adding up in my head.

    1. a.
      [intransitive] if small amounts add up, they gradually produce a large total

      All these little expenses soon add up.

  2. 2
    [intransitive] [usually in negatives] if a set of facts does not add up, you do not believe it is correct because it does not match other information that you already have

    There’s something about this case that just doesn’t add up.

See also main entry: add