arithmetic /æɹɪθˈmɛtɪk/adjective 2[əˈɹɪθmətɪk] noun 2[əˈɹɪθmətɪk] adjective 1forms 1 adjective2 •Of, relating to, or using arithmetic; arithmetical.Moreover, the latest work of Katz, involving the so-called 'Larsen alternative', provides new criteria, of a very arithmetic nature, to (almost) determine the rational monodromy group — 2008 •Of a progression, mean, etc, computed solely using addition. arithmetic [əˈɹɪθmətɪk] noun2 •The mathematics of numbers (integers, rational numbers, real numbers, or complex numbers) under the operations of addition, subtraction, multiplication, and division. •(old-fashioned) Number theory. adjective1 •Increasing or decreasing by an arithmetic progression.Growth in the most mature markets is likely to be arithmetic; on what rational basis could one hope for exponential growth there? formsarithmetics