WordReference Random House Learner's Dictionary of American English © 2017
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 
  1. MathematicsAlso, ˌar•ithˈmet•i•cal. of or relating to the rules of arithmetic:arithmetical computations.
ar•ith•met•i•cal•ly, adv. 

WordReference Random House Unabridged Dictionary of American English © 2017
a•rith•me•tic  (n. ə rithmə tik;adj. ar′ith metik),USA pronunciation n. 
  1. Mathematicsthe method or process of computation with figures: the most elementary branch of mathematics.
  2. MathematicsAlso called  higher arithmetic, theoretical arithmetic. the theory of numbers;
    the study of the divisibility of whole numbers, the remainders after division, etc.
  3. Mathematicsa book on this subject.

adj.  ar•ith•met•ic 
  1. MathematicsAlso,  ar′ith•meti•cal. of or pertaining to arithmetic.
ar′ith•meti•cal•ly, adv. 
  • Medieval Latin arismētica, with s for Late Greek th
  • Old French arismetique
  • Greek arithmētiké̄ (téchnē) (art, skill) of numbers, equivalent. to arithmé(ein) to reckon + -t(o)- verbal adjective, adjectival + -iké̄ -ic; replacing Middle English arsmet(r)ike
  • Latin arithmētica, feminine singular of arithmēticus
  • 1200–50

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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