collimate.
To focus into a narrow beam or column; to adjust a focusing device so that it produces a narrow beam.
Meaning & usage
To focus into a narrow beam or column; to adjust a focusing device so that it produces a narrow beam.
Lead bricks were placed around the radioactive source so that the escaping gamma rays would be limited to a collimated beam rather than filling the lab.
I need to collimate my telescope so that the images are clearer.
Where this word comes from
First attested in 1623; borrowed from Latin collimātus, perfect passive participle of collīmō (see -ate (verb-forming suffix)), itself originating from a misreading of collīniō, collīneō.
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Definitions, grammatical labels, IPA, etymology and examples: Wiktionary contributors, extracted by Kaikki / Wiktextract. Adapted under CC BY-SA 4.0. Selected fields and authored examples are shown; third-party quotations and audio are omitted. See contributor history.
Last enriched 2026-09-10. Definitions are in English. Romanizations are shown when supplied by the source; syllable estimates are omitted for unsupported scripts.