A railing placed alongside a stairway or road for safety
Guardrail Sentence Examples
Don't attach fly-posters or advertising banners to pedestrian guardrail.
Select or modify plans to insure that your child's head and arms can't fit under the guardrail's bottom frame either.
There should be no more than a three-and-a-half inch gap between the bed frame and the guardrail on bunk beds designed for children, and the space between rails shouldn't be wide enough for a child's head to fit in between.