# preservative

/pɹiˈzɝvətɪv/ (US) · /pɹɪsˈɜːvətˌɪv/ (UK) · CEFR B2 · Noun

Source: https://englishreference.com/word/preservative
Updated: 2026-05-26

## Definition

a substance added to food or medicine to stop it from going bad or spoiling. It helps things stay fresh for a longer time.

For teachers: a substance added to food, medicine, or other perishable materials to prevent spoilage or decay. It inhibits the growth of bacteria, fungi, and other microorganisms.

## Examples

- Salt is a natural preservative that keeps meat fresh.
- Many processed snacks contain chemical preservatives to ensure they remain safe to eat for several months on the shelf.
- While synthetic preservatives offer significant shelf-life benefits, many consumers now prefer products that rely on natural alternatives like rosemary extract or vinegar to maintain freshness.

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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.