# type safety

CEFR C1 · Compound

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

## Definition

a feature in computer programming that prevents errors by making sure data is used correctly. It stops a program from trying to do things that do not make sense, like adding a word to a number.

For teachers: the extent to which a programming language discourages or prevents type errors. It ensures that operations are only performed on data of the appropriate category, typically enforced through static or dynamic checks.

## Examples

- Good type safety helps developers catch bugs before the code runs.
- The team switched to a language with stronger type safety to reduce the number of runtime crashes in their application.
- While dynamic languages offer flexibility, many large-scale engineering projects prefer the rigorous type safety of static systems to maintain internal consistency across complex codebases.

## Usage notes

- Commonly used in the context of software development and computer science.

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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.