Definition of algorithm noun from the Oxford Advanced Learner's Dictionary

 

algorithm

 noun
noun
BrE BrE//ˈælɡərɪðəm//
 
; NAmE NAmE//ˈælɡərɪðəm//
 
(computing)
 
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a set of rules that must be followed when solving a particular problem Word Origin late 17th cent. (denoting the Arabic or decimal notation of numbers): variant (influenced by Greek arithmos ‘number’) of Middle English algorism, via Old French from medieval Latin algorismus. The Arabic source, al-K̲wārizmī ‘the man of K̲wārizm’ (now Khiva), was a name given to the 9th-cent. mathematician Abū Ja‘far Muhammad ibn Mūsa, author of widely translated works on algebra and arithmetic.
See the Oxford Advanced American Dictionary entry: algorithm