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

Synonyms & Similar Words

Relevance

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 The prompts direct the attacking LLM to perform an action forbidden by its guardrails, the safety barriers AI developers erect to prevent it from taking harmful actions. Dan Goodin, ArsTechnica, 13 July 2026 Funding was ultimately restored after the budget committee added a series of guardrails to the state’s participation in the program. Haley Parsley, Sacbee.com, 13 July 2026 Building those guardrails now will help ensure the technology delivers benefits while minimizing unintended consequences. Pravir Malik, Forbes.com, 10 July 2026 Voters electing representatives to municipal office should be able to have their priorities met without the state government putting up more guardrails to local tax policy. Oliver Adams Larkin, Sun Sentinel, 10 July 2026 See All Example Sentences for guardrail
Recent Examples of Synonyms for guardrail
Noun
  • Coffee on the porch, boats pulled from shore, wet towels over railings, late light moving through the trees.
    Spencer Elliott, Forbes.com, 10 July 2026
  • The lights take up to five hours to recharge in full sunlight, and can be attached to fences or railings with screws or adhesive tape.
    Stephanie Osmanski, Better Homes & Gardens, 7 July 2026
Noun
  • Grab bars — rails attached to walls, particularly in bathrooms — help provide balance and prevent falls, preventing serious injuries, said Jim Christian, founder of the effort to push Medicare to cover the devices, Safety Bars for America.
    Panashe Matemba-Mutasa, Mercury News, 13 July 2026
  • According to the latest available rail passenger statistics, a grand total of 76 people have alighted or boarded at Shippea Hill in the previous 12 months.
    Rob Crossan, Condé Nast Traveler, 13 July 2026

Browse Nearby Words

Cite this Entry

“Guardrail.” Merriam-Webster.com Thesaurus, Merriam-Webster, https://www.merriam-webster.com/thesaurus/guardrail. Accessed 17 Jul. 2026.

Love words? Need even more definitions?

Subscribe to America's largest dictionary and get thousands more definitions and advanced search—ad free!

More from Merriam-Webster