recursion: meaning, definition, pronunciation and examples
C1-C2Formal, Technical, Academic
Quick answer
What does “recursion” mean?
The process of defining something in terms of itself, often in a way that involves repeated application of a rule or procedure.
Audio
Pronunciation
Definition
Meaning and Definition
The process of defining something in terms of itself, often in a way that involves repeated application of a rule or procedure.
In computing and mathematics, a method where the solution to a problem depends on solutions to smaller instances of the same problem; a function that calls itself. In linguistics, the property of embedding a structure within another instance of the same type of structure, enabling potentially infinite generation.
Dialectal Variation
British vs American Usage
Differences
No significant differences in meaning or spelling. Both use the same spelling, pronunciation, and technical definition.
Connotations
Identical connotations as a technical term; no regional variation in nuance.
Frequency
Equally low frequency in general speech, but equally high frequency in technical domains like computer science and formal linguistics in both regions.
Grammar
How to Use “recursion” in a Sentence
recursion in [noun phrase]recursion of [noun phrase]recursion through [noun phrase][verb] recursionVocabulary
Collocations
Examples
Examples of “recursion” in a Sentence
verb
British English
- The function is designed to recurse through the directory tree.
American English
- The method will recurse on the left subtree first.
adverb
British English
- The data is processed recursively.
- The definition builds the structure recursively.
American English
- The function calls itself recursively.
- The series is defined recursively.
adjective
British English
- A recursive function must have a base case to terminate.
- The grammar rule is recursive in nature.
American English
- We solved the problem with a recursive algorithm.
- His argument became weirdly recursive.
Usage
Meaning in Context
Business
Rare. May appear in tech-business contexts, e.g., 'The algorithm uses recursion to process nested data structures efficiently.'
Academic
Very common in Computer Science, Mathematics, Linguistics, and Cognitive Science. Core concept in theories of computation and grammar.
Everyday
Very rare. If used, it's metaphorical: 'Our conversation felt like a recursion of the same argument.'
Technical
The primary domain. Refers precisely to a function calling itself or a rule being reapplied to its own result.
Vocabulary
Synonyms of “recursion”
Strong
Weak
Vocabulary
Antonyms of “recursion”
Watch out
Common Mistakes When Using “recursion”
- Confusing 'recursion' with 'iteration' (a loop). While both involve repetition, recursion specifically requires self-calling.
- Using 'recursion' in everyday conversation where 'repetition' or 'cycle' would be more natural and understood.
- Misspelling as 'recursion' (correct) vs. 'recursion' (incorrect).
FAQ
Frequently Asked Questions
Not exactly. Both achieve repetition, but recursion is a specific technique where a function calls itself, breaking a problem into smaller sub-problems. Looping (iteration) repeats a block of code using constructs like 'for' or 'while' without self-calling.
Yes. The process of searching for a file on your computer: Open a folder (1). If you find the file, stop. If not, look inside any folders within the first folder (2), applying the same search process to each. This is recursive because you use the same 'search' procedure on sub-folders.
Recursion in language is the ability to put one phrase inside another of the same type, e.g., 'the cat [that chased the mouse [that ate the cheese]]'. This property is argued to be uniquely human and allows for the creation of a potentially infinite number of sentences from a finite set of rules.
A 'stack overflow' error. If the recursion doesn't have a proper condition to stop (a base case), or goes too deep, it consumes all the available call stack memory in the computer, causing the program to crash.
Recursion is usually formal, technical, academic in register.
Recursion: in British English it is pronounced /rɪˈkɜː.ʒən/, and in American English it is pronounced /rɪˈkɝː.ʒən/. Tap the audio buttons above to hear it.
Phrases
Idioms & Phrases
- “[Not typically found in idioms; used literally in technical domains]”
Learning
Memory Aids
Mnemonic
Imagine a set of Russian nesting dolls (matryoshka). Each doll opens to reveal a smaller version of itself inside. This is a visual metaphor for RECURSION – a structure containing a smaller version of the same structure.
Conceptual Metaphor
A SELF-SIMILAR PATTERN (e.g., a fractal, a reflection in opposing mirrors), A LOOP THAT FEEDS BACK INTO ITSELF, A STORY WITHIN A STORY.
Practice
Quiz
In computer science, what is essential for a recursive function to work correctly and not run forever?