noun

• (countable) A collection of ordered steps that solve a mathematical problem. A precise step-by-step plan for a computational procedure that possibly begins with an input value and yields an output value in a finite number of steps.
• (loosely) A flowchart illustrating a decision-making process for human users, especially health care professionals.
• 2023, Lee SG, Blood AJ, Cannon CP, Gordon WJ, Nichols H, Zelle D, Scirica BM, Fisher NDL, “Remote cardiovascular hypertension program enhanced blood pressure control during the COVID-19 pandemic”, in J Am Heart Assoc, volume 12, number 6, →DOI, →PMID, page e027296:
• (uncountable, obsolete) Calculation with Arabic numerals; algorism.
• (informal, social media, by extension, usually preceded with "the") The recommendation algorithm used by social media websites to determine the contents of one's feed.