WordReference Random House Learner's Dictionary of American English © 2015
a•rith•me•tic /n. əˈrɪθmətɪk; adj. ˌærɪθˈmɛtɪk/USA pronunciation n. [uncountable]
  1. Mathematicsthe method, process, or study of adding, subtracting, multiplying, and dividing numbers.

adj. ar•ith•met•ic 
  • MathematicsAlso, ˌar•ithˈmet•i•cal. of or relating to the rules of arithmetic:arithmetical computations.
  • ar•ith•met•i•cal•ly,adv. 

    Collins Concise English Dictionary © HarperCollins Publishers::

    arithmetic /əˈrɪθmətɪk/ n
    1. the branch of mathematics concerned with numerical calculations, such as addition, subtraction, multiplication, and division
    2. one or more calculations involving numerical operations
    3. knowledge of or skill in using arithmetic
    adj /ˌærɪθˈmɛtɪk/ˌarith'metical
    1. of, relating to, or using arithmetic
    Etymology: 13th Century: from Latin arithmētica, from Greek arithmētikē, from arithmein to count, from arithmos number

    ˌarithˈmetically adv aˌrithmeˈtician n

    'arithmetic' also found in these entries:

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