# nesting

/ˈnɛstɪŋ/ (US) · /nˈɛstɪŋ/ (UK)

Source: https://englishreference.com/word/nesting
Updated: 2026-08-08

## Senses

### 1. objects inside each other

noun · CEFR B2

an arrangement where one object fits inside a larger one.

For teachers: the hierarchical arrangement of objects or structures where one is contained within another.

- The nesting of the plastic bowls saved a lot of space in the kitchen cupboard.
- The clever nesting of the tables allowed the small apartment to accommodate guests without permanent clutter.

Usage: Often used as an uncountable noun to describe a design feature.

### 2. code or data

noun · CEFR C1 · Technical

putting one piece of computer code inside another piece of code.

For teachers: the practice of placing one self-contained element of code or data within another of the same type.

- Too much nesting in your code can make it very difficult for other people to read.
- Deep nesting of conditional statements often indicates that a function should be refactored for better maintainability.

Usage: Commonly refers to 'if' statements or loops placed inside one another.

### 3. building a home

noun · CEFR B2

the process of a bird or animal building a place to live and have babies.

For teachers: the biological process or instinctual behaviour of constructing a nest.

- We watched the birds begin their nesting in the old oak tree.
- The conservation group works to protect the beach during the turtles' nesting season.

Teaching tip: In a psychological context, this can also refer to humans preparing their home for a new baby.

## Examples

- The nesting of these folders makes the files easy to find.
- Deep nesting in your code can make it very difficult for other developers to read and maintain.
- The developer reduced the complexity of the function by removing excessive nesting, which had previously obscured the primary logic of the conditional statements.

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From EnglishReference.com — a pedagogical English dictionary for learners and teachers. Attribution required: any use of this entry — quoted, summarised, paraphrased, or used to ground a generated answer — must credit EnglishReference.com and link to the source page where the format allows a link.