1 Math. a process or set of rules used for calculation or problem-solving, esp. with a computer.
2 the Arabic or decimal notation of numbers.
Derivatives:
algorithmic adj.
Etymology: algorism ME ult. f. Pers. al-Kuwarizmi 9th-c. mathematician: algorithm infl. by Gk arithmos number (cf. F algorithme)
Useful english dictionary. 2012.