# testing

/ˈtɛstɪŋ/ (US) · /tˈɛstɪŋ/ (UK)

Source: https://englishreference.com/word/testing
Updated: 2026-06-19

## Senses

### 1. checking if something works

noun · CEFR B1

the process of checking a person, machine, or system to see if it works well.

For teachers: the systematic process of evaluating the quality, performance, or reliability of something before it is put into widespread use.

- The new software is currently undergoing testing to find any bugs.
- Rigorous safety testing is mandatory for all new medical devices before they can be approved for clinical trials by the regulatory board.

Usage: Often used as an uncountable noun when referring to a general process.

### 2. difficult or challenging

adjective · CEFR B2

difficult to deal with because it requires a lot of effort or patience.

For teachers: challenging or demanding; specifically used for situations that strain one's endurance or abilities.

- It has been a testing time for the family since they lost their home.
- The marathon proved to be a testing experience for even the most seasoned athletes due to the unexpected heat and humidity.

Usage: Usually placed before the noun it describes.

## Examples

- The new software is currently undergoing final testing.
- Rigorous safety testing is required by law before any new car model can be sold to the public.
- The engineering team extended the testing phase by three months to ensure the structural integrity of the bridge under extreme weather conditions.

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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.