motion detector

Fetched 2026-10-26 (cache).

Synonyms: motion detection

Antonyms: motion detection

Related words from Datamuse; suggestions, not definitions.

Noun

1. A device used in security systems that can alert the user of the presence of a moving object.

Source: Wiktionary · CC BY-SA 4.0 (Wiktionary dump) · cached copy, not a rewrite.