# OOP

/ˈup/ (US) · CEFR C1 · Noun

Source: https://englishreference.com/word/oop
Updated: 2026-07-22

## Definition

Stands for Object-Oriented Programming. A way of writing computer code where you organize data and actions into groups called 'objects'.

For teachers: Abbreviation for Object-Oriented Programming. A programming paradigm based on the concept of 'objects', which can contain data in the form of fields and code in the form of procedures.

## Examples

- Most modern software is built using OOP principles.
- The lead developer decided to use OOP for the new project to make the code easier for the team to maintain and reuse.
- While functional programming has gained popularity, OOP remains the dominant paradigm for large-scale enterprise applications due to its robust support for encapsulation and inheritance.

## Usage notes

- Often used as a modifier before other nouns, such as 'OOP principles' or 'OOP languages'.

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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.