English Reference

Word

algorithm

Phoneticsal·go·rithm

US/ˈæɫɡɝˌɪðəm/

UK/ˈælɡəɹˌɪθəm/

Definitions

01computing/math

B2 · Computing

n. a set of step-by-step instructions that a computer follows to complete a task.

n. a precise, finite sequence of instructions or rules designed to perform a specific task or solve a mathematical problem.

“The search engine uses a complex algorithm to find the most relevant websites for you.”

“The encryption algorithm ensures that sensitive data remains secure by converting plain text into a complex code that is nearly impossible to crack without the key.”

Technical

Usage

Often used with verbs like 'develop', 'implement', or 'run'.

02social media/feeds

B2 · Computing

n. the system used by social media apps to decide which posts or videos you see first.

n. the automated curation and recommendation systems employed by digital platforms to personalise user experience and maximise engagement.

“I keep seeing cat videos because the algorithm knows I like them.”

“Content creators often struggle to adapt their strategies whenever the platform's algorithm changes its criteria for promoting viral videos.”

Informal

Teaching tip

In casual conversation, people often personify 'the algorithm' as if it has its own intentions or personality.

Synonyms

recommender systemfeed

03decision-making guide

C1 · Medicine

n. a chart or list of steps that helps people, like doctors, make a decision.

n. a systematic procedure or flowchart used to guide human decision-making, particularly in clinical or diagnostic contexts.

“The hospital followed a strict algorithm to decide which patients needed immediate surgery.”

“The diagnostic algorithm provides a step-by-step framework for clinicians to identify rare autoimmune disorders based on specific patient symptoms.”

Technical · Formal

Synonyms

Real-World Examples

“And it's continuing - social media posts, actively recommended by Instagram's algorithm, are advertising another attempt at the crossing this weekend.”
BBC News · 14 Aug 2026
“Spotify is to label AI artists and exclude them from algorithm recommendations as part of a crackdown on fake performers.”
The Guardian · 11 Aug 2026
“Hall also points to the impact of the digital environment and people becoming "addicted by design" through algorithms.”
BBC News · 8 Aug 2026

Etymology

Etymology tree Arabic ال (al-) Old Persian 𐎢𐎺𐎠𐎼𐏀𐎷𐎡𐏁 (u-v-a-r-z-mi-i-š) Classical Persian خْوَارَزْم (xwārazm)bor. Arabic خَوَارِزْم (ḵawārizm) Arabic ـِيّ (-iyy) Arabic خَوَارِزْمِيّ (ḵawārizmiyy) Arabic الخَوَارِزْمِيّ (al-ḵawārizmiyy)bor. Medieval Latin algorismusbor. Anglo-Norman algorismebor. Middle English algorisme English algorism ▲ English arithmo-influ. English algorithm From Middle English algorisme, augrym, from Anglo-Norman algorisme, augrim, from Medieval Latin algorismus, from Arabic الخَوَارِزْمِيّ (al-ḵawārizmiyy), the nisba of Persian mathematician Muḥammad ibn Mūsā al-Khwārizmī and a toponymic name meaning "person from Chorasmia". The spelling change (-s- > -th-) was influenced by unrelated Ancient Greek ἀριθμός (arithmós) (whence English arithmo-).

Etymology adapted from Wiktionary, available under CC BY-SA 4.0.

Word family

algorithmNounalgorithmicAdjective

Related words

Domains

MathematicsProgramming

This entry

Level
B2 · Upper Intermediate
Frequency
Common
Updated

Scan code

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English Reference