# lifesaver

/ˈɫaɪfˌseɪvɝ/ (US) · /lˈaɪfseɪvɐ/ (UK) · CEFR B1 · Noun

Source: https://englishreference.com/word/lifesaver
Updated: 2026-05-19

## Definition

something that helps you survive or solves a very difficult problem. You use this to describe a person or thing that is extremely useful in a dangerous or stressful situation.

For teachers: a person or thing that provides essential help or relief in a critical situation. Often used figuratively to describe a solution to a significant problem.

## Examples

- The new software was a lifesaver for our busy team.
- When the car broke down on the highway, the roadside assistance service was a lifesaver for the stranded family.
- The discovery of the ancient manuscript proved to be a lifesaver for the historian, providing the missing evidence required to complete her decades-long research project.

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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.