contact trace

verb

contact traced; contact tracing; contact traces

intransitive verb

: to identify, notify, and monitor individuals who may have had close contact with a person having a confirmed or probable case of infectious disease : to engage in the practice of contact tracing
How well a college contact traces, places infected students in isolation, disseminates a steady stream of messaging to students about following safety practices and punishes offenders all have an impact on how much the virus spreads, [Gonzalo] Bearman said.Eric Kolenich
Campbell County Public Health … also contact traces for diseases like measles and whooping cough, where a dozen cases qualifies as an outbreak.Johnathan Gallardo and Mike Moore
Yet the only way we'll all win is if we'll do everything possible between now and then—wear a mask, wash our hands, socially distance, contact trace—to put this coronavirus permanently in our rearview mirror in order to return to our old normal every hour of every day.Mark Wiedmer

transitive verb

: to identify and notify (someone) through contact tracing
Unfortunately, over the course of the following days, three of my friends … tested positive for COVID-19, and I was suddenly contact tracedSophie Mackin

Examples of contact trace in a Sentence

Recent Examples on the Web
Examples are automatically compiled from online sources to show current usage. Read More Opinions expressed in the examples do not represent those of Merriam-Webster or its editors. Send us feedback.
Our contact tracing rate is now around 50%. Helen Branswell, STAT, 13 June 2026 That leaves active case finding, isolation, and contact tracing as the primary tools to halt the spread. Beth Mole, ArsTechnica, 22 May 2026 Dunn and Price were doing contact tracing and quarantine checks, in addition to keeping the clinic open. Imani Cruzen, Twin Cities, 7 June 2026 One of the most important ways to get an outbreak under control is contact tracing, which can help break chains of transmission by identifying people who might have been exposed. Dr. Sanjay Gupta, CNN Money, 6 June 2026 See All Example Sentences for contact trace

Word History

First Known Use

1987, in the meaning defined at intransitive sense

Time Traveler
The first known use of contact trace was in 1987

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Cite this Entry

“Contact trace.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/contact%20trace. Accessed 7 Jul. 2026.

Medical Definition

contact trace

verb

intransitive verb

: to identify, notify, and monitor individuals who may have had close contact with a person having a confirmed or probable case of infectious disease : to engage in the practice of contact tracing
Campbell County Public Health … contact traces for diseases like measles and whooping cough, where a dozen cases qualifies as an outbreak.Johnathan Gallardo and Mike Moore, The Billings (Montana) Gazette

transitive verb

: to identify and notify (someone) through contact tracing
When a first major outbreak hit Grand Forks, North Dakota, in April, the problem was clear: More than 150 employees of a wind turbine blade factory were infected. The factory shut its doors for several weeks, and public health officials tested and contact traced each case.Sarah Mervosh and Lucy Tompkins, The Houston Chronicle
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