# detonator

/ˈdɛtəˌneɪtɝ/ (US) · /dˈɛtənˌeɪtɐ/ (UK) · CEFR B2 · Noun

Source: https://englishreference.com/word/detonator
Updated: 2026-10-19

## Definition

a small device that makes a bomb or other explosive go off. You press it or switch it on to start the explosion from a safe distance.

For teachers: a device that initiates the explosion of a bomb, blasting charge, or other explosive material. Activated mechanically, electrically, or by remote signal to start detonation.

## Examples

- He presses the detonator and the fireworks explode.
- The demolition crew checks the detonator twice before clearing the old bridge for a controlled explosion.
- Investigators traced the failed blast to a faulty detonator whose delayed signal left the main charge intact, forcing the team to redesign the entire firing sequence.

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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.