# loader

/ˈɫoʊdɝ/ (US) · /lˈəʊdɐ/ (UK) · CEFR C1 · Noun

Source: https://englishreference.com/word/loader
Updated: 2026-05-08

## Definition

a small computer program that prepares other software to run. It moves the program's data into the computer's memory so you can start using it.

For teachers: a utility program responsible for copying an executable file from storage into main memory and preparing it for execution. Often operates as a component of the operating system's kernel.

## Examples

- The game takes a few seconds for the loader to finish.
- If the system loader cannot find the necessary library files, the application will fail to launch and display an error message.
- Modern operating systems use a dynamic loader to link shared libraries at runtime, which helps reduce the overall memory footprint of multiple concurrent processes.

## Usage notes

- In computing contexts, it refers specifically to the software component; in industrial contexts, it refers to heavy machinery or a person who loads cargo.

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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.