- the science or art of computing by positive real numbers, specif. by adding, subtracting, multiplying, and dividing
- knowledge of or skill in this science: her
*arithmetic*is poor

Origin of arithmetic

Middle English*arsmetrike*from Old French

*arismetrique*(infl. in form by Classical Latin

*ars metrica*, the art of measurement) from Classical Latin

*arithmetica*from Classical Greek (

*h?) arithm?tik? (techn?*), (the) counting (art) from

*arithm?tikos*, arithmetical from

*arithmein*, to count from

*arithmos*, number