Definition of guardrailnext
as in railing
a protective barrier consisting of a horizontal bar and its supports the car ran off the road, but fortunately only hit the guardrail

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Example Sentences

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.
Recent Examples of guardrail However, senior administration officials became worried that users might be able to circumvent Fable 5’s guardrails — though experts disagreed over the severity of the risk. Jared Perlo, NBC news, 1 July 2026 Most enterprises have invested in AI infrastructure—models, pipelines, compute—and in AI governance frameworks and guardrails. Asaf Kochan, Forbes.com, 1 July 2026 The company first unveiled Mythos to an exclusive group of users earlier this year, before rolling out Fable, a version with the same underlying capabilities but with more guardrails and safety filters, designed for general use. Tristan Bove, Fortune, 1 July 2026 In this dream world, the guardrail restrictions are no longer enforced. Dan Goodin, ArsTechnica, 30 June 2026 See All Example Sentences for guardrail
Recent Examples of Synonyms for guardrail
Noun
  • Neusch saw a couple of the house’s fire-andys roll along the balcony, their extinguisher nozzles deployed over the railings, pumping clouds of viscous yellow retardant foam into the atrium.
    Jeff Spry, Space.com, 26 June 2026
  • This 1889 Second Empire–style Victorian in the Gold Coast has a spacious roof terrace with a wrought-iron decorative railing, space for alfresco dining and lounging, and lake views.
    The Week US, TheWeek, 22 June 2026
Noun
  • Those attending can get a free Sacramento Regional Transit light rail ride Wednesday by showing a picture of the event’s poster, which can be found on the historic district’s website.
    Corey Schmidt, Sacbee.com, 29 June 2026
  • The Chicago Transit Authority only confirmed that a person was found with a gunshot wound to the chest outside its 98th Street rail maintenance facility, and said the incident did not involve a CTA rail station and did not involve passengers.
    Darius Johnson, CBS News, 29 June 2026

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Cite this Entry

“Guardrail.” Merriam-Webster.com Thesaurus, Merriam-Webster, https://www.merriam-webster.com/thesaurus/guardrail. Accessed 2 Jul. 2026.

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