guardrail
noun
guard·rail
ˈgärd-ˌrāl 
: a railing guarding usually against danger
especially
: a barrier placed along the edge of a highway at dangerous points
Examples of guardrail in a Sentence
the car ran off the road, but fortunately only hit the guardrail
Recent Examples on the Web
But the program is already starting to face some backlash over concerns the guardrails go too far.
—
Michael Kan, PC Magazine, 19 Mar. 2026
Kelly, who built her reputation in a system defined by editorial constraints and institutional guardrails, now operates in one where those limits are largely absent.
—Kevin Dolak, HollywoodReporter, 18 Mar. 2026
Klapper says Learned Hand has extensive guardrails to prevent the AI from inventing precedents and making other major mistakes.
—James Queally, Los Angeles Times, 18 Mar. 2026
In truth, Sadek says, nobody really knows how to build guardrails that work.
—Joe Hagan, Vanity Fair, 18 Mar. 2026
See All Example Sentences for guardrail
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Michael Kan, PC Magazine, 19 Mar. 2026
Kelly, who built her reputation in a system defined by editorial constraints and institutional guardrails, now operates in one where those limits are largely absent.
—Kevin Dolak, HollywoodReporter, 18 Mar. 2026
Klapper says Learned Hand has extensive guardrails to prevent the AI from inventing precedents and making other major mistakes.
—James Queally, Los Angeles Times, 18 Mar. 2026
In truth, Sadek says, nobody really knows how to build guardrails that work.
—Joe Hagan, Vanity Fair, 18 Mar. 2026
See All Example Sentences for guardrail
Cite this Entry
“Guardrail.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/guardrail. Accessed 21 Mar. 2026.
Copy CitationKids Definition
guardrail
noun
guard·rail
ˈgär-ˌdrāl
: a protective railing placed along dangerous areas (as of a road)
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